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Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access be…

cve CVE-2025-10466 1 source, 1 claim · Watch

NVD writes:
Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM. the claim
Severity
MEDIUM NVD
CVSS
5.9 NVD
Fixed in
1.3.1-0329 NVD
Vendor
Synology NVD
Product
Safe Access NVD
CWE
CWE-79 NVD

How far exploitation has got

  1. No public code known
  2. Proof of concept
  3. Proof of concept, verified
  4. A Metasploit module
  5. Exploited in the wild
  6. Used in ransomware campaigns

Timeline

2026-05-27first spoke of it: Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM.NVD

Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM.

What it is to other things

affectssynology/router_manager
NVD
affectssynology/safe_access
NVD
made_bysynology
NVD
Every value, with what each source said and its receipt
PropertySourceSaidMeans here
Automatable
automatable
NVDno
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 UTCno
2026-10-02 12:00 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "affected",
            "product": "Safe Access",
            "vendor": "Synology",
            "versions": [
              {
                "lessThan": "1.3.1-0329",
                "status": "affected",
                "version": "*",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@synology.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:synology:safe_access:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "DBDF3EDA-CAA9-4934-8817-FBAD60015A22",
                "versionEndExcluding": "1.3.1-0329",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          },
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:o:synology:router_manager:1.3:*:*:*:*:*:*:*",
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                "vulnerable": false
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ],
        "operator": "AND"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM."
      },
      {
        "lang": "es",
        "value": "Neutralización incorrecta de la entrada durante la generación de páginas web ('Cross-site Scripting') vulnerabilidad en Safe Access en Synology Safe Access anterior a 1.3.1-0329 permite a usuarios remotos autenticados con privilegios de administrador leer o escribir archivos específicos que contienen información no sensible o realizar una denegación de servicio limitada en SRM."
      }
    ],
    "id": "CVE-2025-10466",
    "lastModified": "2026-09-30T21:10:00.190",
    "metrics": {
      "cvssMetricV31": [
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          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
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    "references": [
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        "source": "security@synology.com",
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    ],
    "sourceIdentifier": "security@synology.com",
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}
—
CVSS
cvss
NVD5.9
receipt
Source
NVD
Its words
5.9
Read by
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Said since
2026-10-02 12:00 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
What the source handed over
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                "vulnerable": false
              }
            ],
            "negate": false,
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    "cveTags": [],
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      },
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        "lang": "es",
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      }
    ],
    "id": "CVE-2025-10466",
    "lastModified": "2026-09-30T21:10:00.190",
    "metrics": {
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            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
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}
—
CVSS vector
cvss_vector
NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
receipt
Source
NVD
Its words
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
Read by
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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 UTCCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
2026-10-02 12:00 UTC—
What the source handed over
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          {
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            "product": "Safe Access",
            "vendor": "Synology",
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—
CWE
cwe
NVDCWE-79
receipt
Source
NVD
Its words
CWE-79
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 UTCCWE-79
2026-10-02 12:00 UTC—
What the source handed over
{
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      {
        "affectedData": [
          {
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            "product": "Safe Access",
            "vendor": "Synology",
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—
Exploitation
exploitation
NVDnone
No evidence of exploitation, and no public proof of concept.
receipt
Source
NVD
Its words
none
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 UTCnone
2026-10-02 12:00 UTC—
What the source handed over
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                "versionEndExcluding": "1.3.1-0329",
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              }
            ],
            "negate": false,
            "operator": "OR"
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      },
      {
        "lang": "es",
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      }
    ],
    "id": "CVE-2025-10466",
    "lastModified": "2026-09-30T21:10:00.190",
    "metrics": {
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        "type": "Secondary"
      }
    ]
  }
}
—
Fixed in
fixed_in
NVD1.3.1-0329
receipt
Source
NVD
Its words
1.3.1-0329
Read by
field:cve.affected[].affectedData[].versions[status=affected].lessThan
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 UTC1.3.1-0329
2026-10-02 12:00 UTC—
What the source handed over
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        "source": "security@synology.com"
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    ],
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          },
          "exploitabilityScore": 1.7,
          "impactScore": 3.7,
          "source": "security@synology.com",
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      "ssvcV203": [
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    ],
    "sourceIdentifier": "security@synology.com",
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          }
        ],
        "source": "security@synology.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Product
product
NVDSafe Access
receipt
Source
NVD
Its words
Safe Access
Read by
field:cve.affected[].affectedData[].product
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
What the source handed over
{
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      {
        "affectedData": [
          {
            "defaultStatus": "affected",
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            "vendor": "Synology",
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                "versionType": "semver"
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        ],
        "source": "security@synology.com"
      }
    ],
    "configurations": [
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                "vulnerable": false
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ],
        "operator": "AND"
      }
    ],
    "cveTags": [],
    "descriptions": [
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      },
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      }
    ],
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          "impactScore": 3.7,
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      ],
      "ssvcV203": [
        {
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        "tags": [
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    ],
    "sourceIdentifier": "security@synology.com",
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      }
    ]
  }
}
—
Severity
severity
NVDMEDIUM
From 4.0 to 6.9.
receipt
Source
NVD
Its words
MEDIUM
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 UTCMEDIUM
2026-10-02 12:00 UTC—
What the source handed over
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      {
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          {
            "defaultStatus": "affected",
            "product": "Safe Access",
            "vendor": "Synology",
            "versions": [
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                "status": "affected",
                "version": "*",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@synology.com"
      }
    ],
    "configurations": [
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                "vulnerable": false
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ],
        "operator": "AND"
      }
    ],
    "cveTags": [],
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      },
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    ],
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    "lastModified": "2026-09-30T21:10:00.190",
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          },
          "exploitabilityScore": 1.7,
          "impactScore": 3.7,
          "source": "security@synology.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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    "published": "2026-05-27T09:16:26.230",
    "references": [
      {
        "source": "security@synology.com",
        "tags": [
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        ],
        "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_25_11"
      }
    ],
    "sourceIdentifier": "security@synology.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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          }
        ],
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        "type": "Secondary"
      }
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  }
}
medium
Status
status
NVDAnalyzed
receipt
Source
NVD
Its words
Analyzed
Read by
field:cve.vulnStatus
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
What the source handed over
{
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      {
        "affectedData": [
          {
            "defaultStatus": "affected",
            "product": "Safe Access",
            "vendor": "Synology",
            "versions": [
              {
                "lessThan": "1.3.1-0329",
                "status": "affected",
                "version": "*",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@synology.com"
      }
    ],
    "configurations": [
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                "versionEndExcluding": "1.3.1-0329",
                "vulnerable": true
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                "vulnerable": false
              }
            ],
            "negate": false,
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          }
        ],
        "operator": "AND"
      }
    ],
    "cveTags": [],
    "descriptions": [
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      },
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        "lang": "es",
        "value": "Neutralización incorrecta de la entrada durante la generación de páginas web ('Cross-site Scripting') vulnerabilidad en Safe Access en Synology Safe Access anterior a 1.3.1-0329 permite a usuarios remotos autenticados con privilegios de administrador leer o escribir archivos específicos que contienen información no sensible o realizar una denegación de servicio limitada en SRM."
      }
    ],
    "id": "CVE-2025-10466",
    "lastModified": "2026-09-30T21:10:00.190",
    "metrics": {
      "cvssMetricV31": [
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            "integrityImpact": "LOW",
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            "scope": "CHANGED",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L",
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          },
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          "impactScore": 3.7,
          "source": "security@synology.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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    "published": "2026-05-27T09:16:26.230",
    "references": [
      {
        "source": "security@synology.com",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_25_11"
      }
    ],
    "sourceIdentifier": "security@synology.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
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          }
        ],
        "source": "security@synology.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Technical impact
technical_impact
NVDpartial
The attacker gains limited control, or limited information.
receipt
Source
NVD
Its words
partial
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 UTCpartial
2026-10-02 12:00 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "affected",
            "product": "Safe Access",
            "vendor": "Synology",
            "versions": [
              {
                "lessThan": "1.3.1-0329",
                "status": "affected",
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                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@synology.com"
      }
    ],
    "configurations": [
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                "versionEndExcluding": "1.3.1-0329",
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            ],
            "negate": false,
            "operator": "OR"
          },
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                "vulnerable": false
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ],
        "operator": "AND"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM."
      },
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    ],
    "id": "CVE-2025-10466",
    "lastModified": "2026-09-30T21:10:00.190",
    "metrics": {
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            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
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            "userInteraction": "REQUIRED",
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          },
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          "impactScore": 3.7,
          "source": "security@synology.com",
          "type": "Secondary"
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      ],
      "ssvcV203": [
        {
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    "published": "2026-05-27T09:16:26.230",
    "references": [
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        "source": "security@synology.com",
        "tags": [
          "Vendor Advisory"
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        "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_25_11"
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    ],
    "sourceIdentifier": "security@synology.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-79"
          }
        ],
        "source": "security@synology.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Vendor
vendor
NVDSynology
receipt
Source
NVD
Its words
Synology
Read by
field:cve.affected[].affectedData[].vendor
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "affected",
            "product": "Safe Access",
            "vendor": "Synology",
            "versions": [
              {
                "lessThan": "1.3.1-0329",
                "status": "affected",
                "version": "*",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@synology.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:synology:safe_access:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "DBDF3EDA-CAA9-4934-8817-FBAD60015A22",
                "versionEndExcluding": "1.3.1-0329",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          },
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:o:synology:router_manager:1.3:*:*:*:*:*:*:*",
                "matchCriteriaId": "69719ACD-229C-4685-BADB-52FB55671BD9",
                "vulnerable": false
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ],
        "operator": "AND"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM."
      },
      {
        "lang": "es",
        "value": "Neutralización incorrecta de la entrada durante la generación de páginas web ('Cross-site Scripting') vulnerabilidad en Safe Access en Synology Safe Access anterior a 1.3.1-0329 permite a usuarios remotos autenticados con privilegios de administrador leer o escribir archivos específicos que contienen información no sensible o realizar una denegación de servicio limitada en SRM."
      }
    ],
    "id": "CVE-2025-10466",
    "lastModified": "2026-09-30T21:10:00.190",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L",
            "version": "3.1"
          },
          "exploitabilityScore": 1.7,
          "impactScore": 3.7,
          "source": "security@synology.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2025-10466",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-05-27T13:44:47.333907Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-05-27T09:16:26.230",
    "references": [
      {
        "source": "security@synology.com",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_25_11"
      }
    ],
    "sourceIdentifier": "security@synology.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-79"
          }
        ],
        "source": "security@synology.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Every claim, by kind

vulnerability

Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM.
zetlyn/cve-nvd · 2026-05-27
automatable no cvss 5.9 cvss_vector CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L cwe CWE-79 exploitation none fixed_in 1.3.1-0329 product Safe Access severity MEDIUM status Analyzed technical_impact partial vendor Synology source