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An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens…

cve CVE-2026-23926 1 source, 1 claim · Watch

NVD writes:
An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip. the claim
Severity
MEDIUM NVD
CVSS
6.8 NVD
Vendor
Zabbix NVD
Product
Zabbix 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

2026-05-06first spoke of it: An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip.NVD

An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip.

What it is to other things

affectszabbix/zabbix
NVD
made_byzabbix
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
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unknown",
            "modules": [
              "Frontend"
            ],
            "product": "Zabbix",
            "repo": "https://git.zabbix.com/",
            "vendor": "Zabbix",
            "versions": [
              {
                "changes": [
                  {
                    "at": "7.0.24",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.0.23",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "git"
              },
              {
                "changes": [
                  {
                    "at": "7.4.8",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.4.7",
                "status": "affected",
                "version": "7.4.0",
                "versionType": "git"
              }
            ]
          }
        ],
        "source": "security@zabbix.com"
      }
    ],
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                "versionEndExcluding": "7.0.24",
                "versionStartIncluding": "7.0.0",
                "vulnerable": true
              },
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      }
    ],
    "id": "CVE-2026-23926",
    "lastModified": "2026-09-18T15:35:11.087",
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    "sourceIdentifier": "security@zabbix.com",
    "vulnStatus": "Analyzed",
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        ],
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        "type": "Secondary"
      }
    ]
  }
}
—
CVSS
cvss
NVD6.8
receipt
Source
NVD
Its words
6.8
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
{
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      {
        "affectedData": [
          {
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            "modules": [
              "Frontend"
            ],
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            "versions": [
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                ],
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                "status": "affected",
                "version": "7.0.0",
                "versionType": "git"
              },
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                "status": "affected",
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    ],
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      "cvssMetricV40": [
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—
Cvss4
cvss4
NVD7.3
receipt
Source
NVD
Its words
7.3
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 UTC7.3
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unknown",
            "modules": [
              "Frontend"
            ],
            "product": "Zabbix",
            "repo": "https://git.zabbix.com/",
            "vendor": "Zabbix",
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      }
    ],
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      }
    ]
  }
}
—
Cvss4 vector
cvss4_vector
NVDCVSS:4.0/AV:N/AC:L/AT:P/PR:H/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:P/PR:H/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 UTCCVSS:4.0/AV:N/AC:L/AT:P/PR:H/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": [
          {
            "defaultStatus": "unknown",
            "modules": [
              "Frontend"
            ],
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                  {
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      }
    ]
  }
}
—
CVSS vector
cvss_vector
NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
receipt
Source
NVD
Its words
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/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 UTCCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
2026-09-29 09:45 UTC—
What the source handed over
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      {
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          {
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            "modules": [
              "Frontend"
            ],
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            "vendor": "Zabbix",
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                    "status": "unaffected"
                  }
                ],
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                "status": "affected",
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                "versionType": "git"
              },
              {
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                  {
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                    "status": "unaffected"
                  }
                ],
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                "status": "affected",
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              }
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            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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            "modifiedUserInteraction": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
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            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
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          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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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
2026-09-29 09:45 UTC—
What the source handed over
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      {
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          {
            "defaultStatus": "unknown",
            "modules": [
              "Frontend"
            ],
            "product": "Zabbix",
            "repo": "https://git.zabbix.com/",
            "vendor": "Zabbix",
            "versions": [
              {
                "changes": [
                  {
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                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.0.23",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "git"
              },
              {
                "changes": [
                  {
                    "at": "7.4.8",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.4.7",
                "status": "affected",
                "version": "7.4.0",
                "versionType": "git"
              }
            ]
          }
        ],
        "source": "security@zabbix.com"
      }
    ],
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                "versionEndExcluding": "7.0.24",
                "versionStartIncluding": "7.0.0",
                "vulnerable": true
              },
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      }
    ],
    "id": "CVE-2026-23926",
    "lastModified": "2026-09-18T15:35:11.087",
    "metrics": {
      "cvssMetricV31": [
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            "Recovery": "NOT_DEFINED",
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            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
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            "exploitMaturity": "NOT_DEFINED",
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            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
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            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
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            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/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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            "vulnConfidentialityImpact": "HIGH",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security@zabbix.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
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                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
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        ],
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    "sourceIdentifier": "security@zabbix.com",
    "vulnStatus": "Analyzed",
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        "source": "security@zabbix.com",
        "type": "Secondary"
      }
    ]
  }
}
—
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
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unknown",
            "modules": [
              "Frontend"
            ],
            "product": "Zabbix",
            "repo": "https://git.zabbix.com/",
            "vendor": "Zabbix",
            "versions": [
              {
                "changes": [
                  {
                    "at": "7.0.24",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.0.23",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "git"
              },
              {
                "changes": [
                  {
                    "at": "7.4.8",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.4.7",
                "status": "affected",
                "version": "7.4.0",
                "versionType": "git"
              }
            ]
          }
        ],
        "source": "security@zabbix.com"
      }
    ],
    "configurations": [
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                "versionEndExcluding": "7.0.24",
                "versionStartIncluding": "7.0.0",
                "vulnerable": true
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      }
    ],
    "id": "CVE-2026-23926",
    "lastModified": "2026-09-18T15:35:11.087",
    "metrics": {
      "cvssMetricV31": [
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  }
}
—
Product
product
NVDZabbix
receipt
Source
NVD
Its words
Zabbix
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 UTCZabbix
2026-09-29 09:45 UTC—
What the source handed over
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      {
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              "Frontend"
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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
2026-09-29 09:45 UTC—
What the source handed over
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                ],
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}
medium
Status
status
NVDAnalyzed
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
{
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      {
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          {
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            "modules": [
              "Frontend"
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    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-79"
          }
        ],
        "source": "security@zabbix.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Technical impact
technical_impact
NVDtotal
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 UTCtotal
2026-09-29 09:45 UTC—
What the source handed over
{
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    "affected": [
      {
        "affectedData": [
          {
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              "Frontend"
            ],
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            "repo": "https://git.zabbix.com/",
            "vendor": "Zabbix",
            "versions": [
              {
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                    "at": "7.0.24",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.0.23",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "git"
              },
              {
                "changes": [
                  {
                    "at": "7.4.8",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.4.7",
                "status": "affected",
                "version": "7.4.0",
                "versionType": "git"
              }
            ]
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    ],
    "configurations": [
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                "versionEndExcluding": "7.0.24",
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    ],
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    "lastModified": "2026-09-18T15:35:11.087",
    "metrics": {
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      ],
      "cvssMetricV40": [
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            "baseScore": 7.3,
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            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
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            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
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            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
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            "valueDensity": "NOT_DEFINED",
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            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security@zabbix.com",
          "type": "Secondary"
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      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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            "options": [
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                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
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            "timestamp": "2026-05-06T00:00:00+00:00",
            "version": "2.0.3"
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      ]
    },
    "published": "2026-05-06T08:16:01.837",
    "references": [
      {
        "source": "security@zabbix.com",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://support.zabbix.com/browse/ZBX-27758"
      }
    ],
    "sourceIdentifier": "security@zabbix.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
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            "value": "CWE-79"
          }
        ],
        "source": "security@zabbix.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Vendor
vendor
NVDZabbix
receipt
Source
NVD
Its words
Zabbix
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 UTCZabbix
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unknown",
            "modules": [
              "Frontend"
            ],
            "product": "Zabbix",
            "repo": "https://git.zabbix.com/",
            "vendor": "Zabbix",
            "versions": [
              {
                "changes": [
                  {
                    "at": "7.0.24",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.0.23",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "git"
              },
              {
                "changes": [
                  {
                    "at": "7.4.8",
                    "status": "unaffected"
                  }
                ],
                "lessThanOrEqual": "7.4.7",
                "status": "affected",
                "version": "7.4.0",
                "versionType": "git"
              }
            ]
          }
        ],
        "source": "security@zabbix.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
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                "matchCriteriaId": "44821417-4549-40BA-95DB-79C174EB9D5A",
                "versionEndExcluding": "7.0.24",
                "versionStartIncluding": "7.0.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "05916880-BA46-450D-A180-40D10B2C27C5",
                "versionEndExcluding": "7.4.8",
                "versionStartIncluding": "7.4.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip."
      }
    ],
    "id": "CVE-2026-23926",
    "lastModified": "2026-09-18T15:35:11.087",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
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            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 7.3,
            "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": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/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",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security@zabbix.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-23926",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-05-06T00:00:00+00:00",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-05-06T08:16:01.837",
    "references": [
      {
        "source": "security@zabbix.com",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://support.zabbix.com/browse/ZBX-27758"
      }
    ],
    "sourceIdentifier": "security@zabbix.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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          {
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          }
        ],
        "source": "security@zabbix.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Every claim, by kind

vulnerability

An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip.
zetlyn/cve-nvd · 2026-05-06
automatable no cvss 6.8 cvss4 7.3 cvss4_vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/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:H/UI:R/S:U/C:H/I:H/A:H cwe CWE-79 exploitation none product Zabbix severity MEDIUM status Analyzed technical_impact total vendor Zabbix source