FKIE_CVE-2026-20034

Vulnerability from fkie_nvd - Published: 2026-05-06 17:16 - Updated: 2026-07-01 16:01
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-unity-rce-ssrf-hENhuASyVendor Advisory
Impacted products
Vendor Product Version
cisco unity_connection *
cisco unity_connection 14.0
cisco unity_connection 14su1
cisco unity_connection 14su2
cisco unity_connection 14su3
cisco unity_connection 14su4
cisco unity_connection 15.0
cisco unity_connection 15su1
cisco unity_connection 15su2
cisco unity_connection 15su3
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Unity Connection",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "12.5(1)"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU1"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU2"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU3"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU4"
            },
            {
              "status": "affected",
              "version": "14"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU5"
            },
            {
              "status": "affected",
              "version": "14SU1"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU6"
            },
            {
              "status": "affected",
              "version": "14SU2"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU7"
            },
            {
              "status": "affected",
              "version": "14SU3"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU8"
            },
            {
              "status": "affected",
              "version": "14SU3a"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU8a"
            },
            {
              "status": "affected",
              "version": "15"
            },
            {
              "status": "affected",
              "version": "15SU1"
            },
            {
              "status": "affected",
              "version": "14SU4"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU9"
            },
            {
              "status": "affected",
              "version": "15SU2"
            },
            {
              "status": "affected",
              "version": "15SU3"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6313AB2B-8CBB-48FF-BCBF-B24DE98855EF",
              "versionEndExcluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:14.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "A85D56C0-D4A3-43A7-9CD1-FCEB6C8AEF66",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:14su1:*:*:*:*:*:*:*",
              "matchCriteriaId": "774C01A1-9328-45E8-9BDD-470A10BC3C2A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:14su2:*:*:*:*:*:*:*",
              "matchCriteriaId": "CD8AB4B5-12C2-4F02-A4C3-4B8C06AFFD53",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:14su3:*:*:*:*:*:*:*",
              "matchCriteriaId": "181866CE-6279-4422-8EF8-7A12DB5B21F6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:14su4:*:*:*:*:*:*:*",
              "matchCriteriaId": "D09F3655-B513-48F6-82A8-F0F946C52D25",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:15.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "97CC6719-1A7F-48BA-8014-802E235ED80D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:15su1:*:*:*:*:*:*:*",
              "matchCriteriaId": "2C9412EC-282C-4926-83F8-932E24E0FC22",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:15su2:*:*:*:*:*:*:*",
              "matchCriteriaId": "37EFE547-7D3C-4D71-8D46-2C5734B9D64B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unity_connection:15su3:*:*:*:*:*:*:*",
              "matchCriteriaId": "CE6AF25B-E6F9-4E15-902D-4516DFE8C8E2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device.\r\n\r\nThis vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device.\u0026nbsp;To exploit this vulnerability, the attacker must have valid user credentials on the affected device."
    }
  ],
  "id": "CVE-2026-20034",
  "lastModified": "2026-07-01T16:01:11.203",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20034",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-06T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-06T17:16:20.093",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-unity-rce-ssrf-hENhuASy"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-35"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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