FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response

cve CVE-2026-55194 2 sources, 2 claims · Watch

Red Hat writes:
FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response the claim

Severity they disagree: CRITICAL NVD
important Red Hat
CVSS they disagree: 9.8 NVD
8.8 Red Hat
Vendor: FreeRDP NVD
Product: FreeRDP NVD
CWE: CWE-122 NVD
CWE-120 Red Hat

How far exploitation has got

No public code known
Proof of concept
Proof of concept, verified
A Metasploit module
Exploited in the wild
Used in ransomware campaigns

Why the CVSS differs

Metric	NVD	Red Hat
Attack vector AV	network N	network N
Attack complexity AC	low L	low L
Privileges required PR	none N	none N
User interaction UI	none N	required R
Scope S	unchanged U	unchanged U
Confidentiality C	high H	high H
Integrity I	high H	high H
Availability A	high H	high H

Each source scores the same vulnerability from what it judges the attack to need. The rows marked are where they judge it differently.

Timeline

2026-08-19	first spoke of it: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0.	NVD
2026-08-19	first spoke of it: FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response	Red Hat

What it is to other things

affects	freerdp/freerdp NVD
made_by	freerdp NVD

Every value, with what each source said and its receipt

Property Source Said Means here

Automatable

automatable

NVD

At least one of those steps needs a person.

receipt

Source: NVD
Its words: no
Read by: field:cve.metrics.ssvcV203[].ssvcData.options[].automatable
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	no
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
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                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS

cvss

conflict

NVD

9.8

receipt

Source: NVD
Its words: 9.8
Read by: field:cve.metrics.cvssMetricV31[type=Primary].cvssData.baseScore || field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since: 2026-09-29 09:45 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
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      "ssvcV203": [
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          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
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                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
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            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
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    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
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        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
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        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS

cvss

conflict

Red Hat

8.8

receipt

Source: Red Hat
Its words: 8.8
Read by: field:cvss3_score
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-55194",
  "CWE": "CWE-120",
  "advisories": [
    "RHSA-2026:62571",
    "RHSA-2026:71390",
    "RHSA-2026:71388",
    "RHSA-2026:66282",
    "RHSA-2026:61379",
    "RHSA-2026:71387",
    "RHSA-2026:61378",
    "RHSA-2026:68707",
    "RHSA-2026:65855",
    "RHSA-2026:68706",
    "RHSA-2026:66281"
  ],
  "affected_packages": [
    "freerdp-2:2.2.0-14.el8_4.3",
    "freerdp-2:3.10.3-12.el10_2.10",
    "freerdp-0:2.1.1-5.el7_9.12",
    "freerdp-2:2.11.7-7.el9_8.6",
    "freerdp-2:2.11.7-12.el8_10",
    "freerdp-2:2.2.0-12.el8_8.11",
    "freerdp-2:2.11.7-1.el9_6.13",
    "freerdp-2:2.11.2-1.el9_4.11",
    "freerdp-2:2.4.1-6.el9_2.12",
    "freerdp-2:2.2.0-7.el8_6.12",
    "freerdp-2:3.10.3-3.el10_0.16"
  ],
  "bugzilla": "2519824",
  "bugzilla_description": "FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response",
  "cvss3_score": "8.8",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-08-19T17:50:30Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55194.json",
  "severity": "important"
}

—

Cvss4

cvss4

NVD

8.7

receipt

Source: NVD
Its words: 8.7
Read by: field:cve.metrics.cvssMetricV40[type=Primary].cvssData.baseScore || field:cve.metrics.cvssMetricV40[].cvssData.baseScore
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	8.7
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

Cvss4 vector

cvss4_vector

NVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

receipt

Source: NVD
Its words: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Read by: field:cve.metrics.cvssMetricV40[type=Primary].cvssData.vectorString || field:cve.metrics.cvssMetricV40[].cvssData.vectorString
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS vector

cvss_vector

not compared

NVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

receipt

Source: NVD
Its words: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Read by: field:cve.metrics.cvssMetricV31[type=Primary].cvssData.vectorString || field:cve.metrics.cvssMetricV31[].cvssData.vectorString
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS vector

cvss_vector

not compared

Red Hat

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

receipt

Source: Red Hat
Its words: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Read by: field:cvss3_scoring_vector
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

2026-10-06 13:01 UTC	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2026-09-29 09:44 UTC	—

What the source handed over

{
  "CVE": "CVE-2026-55194",
  "CWE": "CWE-120",
  "advisories": [
    "RHSA-2026:62571",
    "RHSA-2026:71390",
    "RHSA-2026:71388",
    "RHSA-2026:66282",
    "RHSA-2026:61379",
    "RHSA-2026:71387",
    "RHSA-2026:61378",
    "RHSA-2026:68707",
    "RHSA-2026:65855",
    "RHSA-2026:68706",
    "RHSA-2026:66281"
  ],
  "affected_packages": [
    "freerdp-2:2.2.0-14.el8_4.3",
    "freerdp-2:3.10.3-12.el10_2.10",
    "freerdp-0:2.1.1-5.el7_9.12",
    "freerdp-2:2.11.7-7.el9_8.6",
    "freerdp-2:2.11.7-12.el8_10",
    "freerdp-2:2.2.0-12.el8_8.11",
    "freerdp-2:2.11.7-1.el9_6.13",
    "freerdp-2:2.11.2-1.el9_4.11",
    "freerdp-2:2.4.1-6.el9_2.12",
    "freerdp-2:2.2.0-7.el8_6.12",
    "freerdp-2:3.10.3-3.el10_0.16"
  ],
  "bugzilla": "2519824",
  "bugzilla_description": "FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response",
  "cvss3_score": "8.8",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-08-19T17:50:30Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55194.json",
  "severity": "important"
}

—

CWE

cwe

different words

NVD

CWE-122

receipt

Source: NVD
Its words: CWE-122
Read by: field:cve.weaknesses[].description[].value
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	CWE-122
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

CWE

cwe

different words

Red Hat

CWE-120

receipt

Source: Red Hat
Its words: CWE-120
Read by: field:CWE
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-55194",
  "CWE": "CWE-120",
  "advisories": [
    "RHSA-2026:62571",
    "RHSA-2026:71390",
    "RHSA-2026:71388",
    "RHSA-2026:66282",
    "RHSA-2026:61379",
    "RHSA-2026:71387",
    "RHSA-2026:61378",
    "RHSA-2026:68707",
    "RHSA-2026:65855",
    "RHSA-2026:68706",
    "RHSA-2026:66281"
  ],
  "affected_packages": [
    "freerdp-2:2.2.0-14.el8_4.3",
    "freerdp-2:3.10.3-12.el10_2.10",
    "freerdp-0:2.1.1-5.el7_9.12",
    "freerdp-2:2.11.7-7.el9_8.6",
    "freerdp-2:2.11.7-12.el8_10",
    "freerdp-2:2.2.0-12.el8_8.11",
    "freerdp-2:2.11.7-1.el9_6.13",
    "freerdp-2:2.11.2-1.el9_4.11",
    "freerdp-2:2.4.1-6.el9_2.12",
    "freerdp-2:2.2.0-7.el8_6.12",
    "freerdp-2:3.10.3-3.el10_0.16"
  ],
  "bugzilla": "2519824",
  "bugzilla_description": "FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response",
  "cvss3_score": "8.8",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-08-19T17:50:30Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55194.json",
  "severity": "important"
}

—

Exploitation

exploitation

NVD

poc

A public proof of concept exists, or exploitation is trivial.

receipt

Source: NVD
Its words: poc
Read by: field:cve.metrics.ssvcV203[].ssvcData.options[].exploitation
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	poc
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

Packages

packages

Red Hat

freerdp-2:2.2.0-14.el8_4.3, freerdp-2:3.10.3-12.el10_2.10, freerdp-0:2.1.1-5.el7_9.12, freerdp-2:2.11.7-7.el9_8.6, freerdp-2:2.11.7-12.el8_10, freerdp-2:2.2.0-12.el8_8.11, freerdp-2:2.11.7-1.el9_6.13, freerdp-2:2.11.2-1.el9_4.11, freerdp-2:2.4.1-6.el9_2.12, freerdp-2:2.2.0-7.el8_6.12, freerdp-2:3.10.3-3.el10_0.16

receipt

Source: Red Hat
Its words: freerdp-2:2.2.0-14.el8_4.3, freerdp-2:3.10.3-12.el10_2.10, freerdp-0:2.1.1-5.el7_9.12, freerdp-2:2.11.7-7.el9_8.6, freerdp-2:2.11.7-12.el8_10, freerdp-2:2.2.0-12.el8_8.11, freerdp-2:2.11.7-1.el9_6.13, freerdp-2:2.11.2-1.el9_4.11, freerdp-2:2.4.1-6.el9_2.12, freerdp-2:2.2.0-7.el8_6.12, freerdp-2:3.10.3-3.el10_0.16
Read by: field:affected_packages[]
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-55194",
  "CWE": "CWE-120",
  "advisories": [
    "RHSA-2026:62571",
    "RHSA-2026:71390",
    "RHSA-2026:71388",
    "RHSA-2026:66282",
    "RHSA-2026:61379",
    "RHSA-2026:71387",
    "RHSA-2026:61378",
    "RHSA-2026:68707",
    "RHSA-2026:65855",
    "RHSA-2026:68706",
    "RHSA-2026:66281"
  ],
  "affected_packages": [
    "freerdp-2:2.2.0-14.el8_4.3",
    "freerdp-2:3.10.3-12.el10_2.10",
    "freerdp-0:2.1.1-5.el7_9.12",
    "freerdp-2:2.11.7-7.el9_8.6",
    "freerdp-2:2.11.7-12.el8_10",
    "freerdp-2:2.2.0-12.el8_8.11",
    "freerdp-2:2.11.7-1.el9_6.13",
    "freerdp-2:2.11.2-1.el9_4.11",
    "freerdp-2:2.4.1-6.el9_2.12",
    "freerdp-2:2.2.0-7.el8_6.12",
    "freerdp-2:3.10.3-3.el10_0.16"
  ],
  "bugzilla": "2519824",
  "bugzilla_description": "FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response",
  "cvss3_score": "8.8",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-08-19T17:50:30Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55194.json",
  "severity": "important"
}

—

Product

product

NVD

FreeRDP

receipt

Source: NVD
Its words: FreeRDP
Read by: field:cve.affected[].affectedData[].product
Said since: 2026-09-29 17:49 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-09-29 17:49 UTC	FreeRDP
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

Severity

severity

conflict

NVD

CRITICAL

From the CVSS base score at 9.0 and above.

receipt

Source: NVD
Its words: CRITICAL
Read by: field:cve.metrics.cvssMetricV31[type=Primary].cvssData.baseSeverity || field:cve.metrics.cvssMetricV31[].cvssData.baseSeverity
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	CRITICAL
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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          },
          "exploitabilityScore": 3.9,
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          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
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      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
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                "exploitation": "poc"
              },
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                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
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            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
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          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

critical

Severity

severity

conflict

Red Hat

important

A flaw that can easily compromise confidentiality, integrity or availability.

receipt

Source: Red Hat
Its words: important
Read by: field:severity
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-55194",
  "CWE": "CWE-120",
  "advisories": [
    "RHSA-2026:62571",
    "RHSA-2026:71390",
    "RHSA-2026:71388",
    "RHSA-2026:66282",
    "RHSA-2026:61379",
    "RHSA-2026:71387",
    "RHSA-2026:61378",
    "RHSA-2026:68707",
    "RHSA-2026:65855",
    "RHSA-2026:68706",
    "RHSA-2026:66281"
  ],
  "affected_packages": [
    "freerdp-2:2.2.0-14.el8_4.3",
    "freerdp-2:3.10.3-12.el10_2.10",
    "freerdp-0:2.1.1-5.el7_9.12",
    "freerdp-2:2.11.7-7.el9_8.6",
    "freerdp-2:2.11.7-12.el8_10",
    "freerdp-2:2.2.0-12.el8_8.11",
    "freerdp-2:2.11.7-1.el9_6.13",
    "freerdp-2:2.11.2-1.el9_4.11",
    "freerdp-2:2.4.1-6.el9_2.12",
    "freerdp-2:2.2.0-7.el8_6.12",
    "freerdp-2:3.10.3-3.el10_0.16"
  ],
  "bugzilla": "2519824",
  "bugzilla_description": "FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response",
  "cvss3_score": "8.8",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-08-19T17:50:30Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55194.json",
  "severity": "important"
}

high

Status

status

NVD

Analyzed

receipt

Source: NVD
Its words: Analyzed
Read by: field:cve.vulnStatus
Said since: 2026-09-29 09:45 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
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                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
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      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
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            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
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      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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              },
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                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

Technical impact

technical_impact

NVD

total

The attacker gains full control of the component, or all of its information.

receipt

Source: NVD
Its words: total
Read by: field:cve.metrics.ssvcV203[].ssvcData.options[].technicalImpact
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	total
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
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          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

Vendor

vendor

NVD

FreeRDP

receipt

Source: NVD
Its words: FreeRDP
Read by: field:cve.affected[].affectedData[].vendor
Said since: 2026-09-29 17:49 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-09-29 17:49 UTC	FreeRDP
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "FreeRDP",
            "vendor": "FreeRDP",
            "versions": [
              {
                "status": "affected",
                "version": "< 3.27.0"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
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                "matchCriteriaId": "F9603C86-160B-40E9-BA5D-813AA03B1A44",
                "versionEndExcluding": "3.27.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0."
      }
    ],
    "id": "CVE-2026-55194",
    "lastModified": "2026-09-24T15:15:35.073",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55194",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-21T03:55:49.884406Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-19T18:16:44.857",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/pull/12873"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9gxm-3mf5-f5cx"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-122"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}

—

Every claim, by kind

vulnerability

FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response zetlyn/cve-redhat · 2026-08-19	cvss 8.8 cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H cwe CWE-120 packages freerdp-2:2.2.0-14.el8_4.3, freerdp-2:3.10.3-12.el10_2.10, freerdp-0:2.1.1-5.el7_9.12, freerdp-2:2.11.7-7.el9_8.6, freerdp-2:2.11.7-12.el8_10, freerdp-2:2.2.0-12.el8_8.11, freerdp-2:2.11.7-1.el9_6.13, freerdp-2:2.11.2-1.el9_4.11, freerdp-2:2.4.1-6.el9_2.12, freerdp-2:2.2.0-7.el8_6.12, freerdp-2:3.10.3-3.el10_0.16 severity important	source
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0. zetlyn/cve-nvd · 2026-08-19	automatable no cvss 9.8 cvss4 8.7 cvss4_vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H cwe CWE-122 exploitation poc product FreeRDP severity CRITICAL status Analyzed technical_impact total vendor FreeRDP	source