FKIE_CVE-2026-20230

Vulnerability from fkie_nvd - Published: 2026-06-03 18:16 - Updated: 2026-07-22 19:10
Severity
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Summary
A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate to root. Note: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root. Note: To exploit this vulnerability, the WebDialer service must be enabled. WebDialer is disabled by default.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssrf-cXPnHcWVendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://denizhalil.com/2026/06/12/cve-2026-20230-cisco-unified-cm-ssrf/Exploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20230US Government Resource
Impacted products
Vendor Product Version
cisco unified_communications_manager *
cisco unified_communications_manager *
cisco unified_communications_manager *
cisco unified_communications_manager *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Unified Communications Manager",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "14"
            },
            {
              "status": "affected",
              "version": "14SU1"
            },
            {
              "status": "affected",
              "version": "14SU2"
            },
            {
              "status": "affected",
              "version": "14SU3"
            },
            {
              "status": "affected",
              "version": "15"
            },
            {
              "status": "affected",
              "version": "15SU1"
            },
            {
              "status": "affected",
              "version": "14SU4"
            },
            {
              "status": "affected",
              "version": "14SU4a"
            },
            {
              "status": "affected",
              "version": "15SU1a"
            },
            {
              "status": "affected",
              "version": "15SU2"
            },
            {
              "status": "affected",
              "version": "15.0.1.13010-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13011-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13012-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13013-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13014-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13015-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13016-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13017-1"
            },
            {
              "status": "affected",
              "version": "15SU3a"
            },
            {
              "status": "affected",
              "version": "14SU5"
            },
            {
              "status": "affected",
              "version": "15SU4"
            },
            {
              "status": "affected",
              "version": "15SU4a"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "cisaActionDue": "2026-06-28",
  "cisaExploitAdd": "2026-06-25",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:*",
              "matchCriteriaId": "9E708402-3D51-4165-8A97-2B3E68116553",
              "versionEndExcluding": "14su6",
              "versionStartIncluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:*",
              "matchCriteriaId": "321D5CC9-ECFC-42FD-AAB4-465E3BC399DA",
              "versionEndExcluding": "14su6",
              "versionStartIncluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:*",
              "matchCriteriaId": "EFBE275E-8043-4F8B-ABE8-48774CF11648",
              "versionEndIncluding": "15su4a",
              "versionStartIncluding": "15.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:*",
              "matchCriteriaId": "06300542-9590-4FE0-8054-7BD15B2CB3BA",
              "versionEndIncluding": "15su4a",
              "versionStartIncluding": "15.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device.\r\n\r\nThis vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate to root.\r\nNote: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root.\r\nNote: To exploit this vulnerability, the WebDialer service must be enabled. WebDialer is disabled by default."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en Cisco Unified Communications Manager (Unified CM) y Cisco Unified Communications Manager Session Management Edition (Unified CM SME) podr\u00eda permitir a un atacante remoto no autenticado realizar ataques de falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) a trav\u00e9s de un dispositivo afectado.\nEsta vulnerabilidad se debe a una validaci\u00f3n de entrada incorrecta para peticiones HTTP espec\u00edficas. Un atacante podr\u00eda explotar esta vulnerabilidad enviando una petici\u00f3n HTTP manipulada a un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante escribir archivos en el sistema operativo subyacente que podr\u00edan usarse m\u00e1s tarde para elevar a root.\nNota: Cisco ha asignado a este aviso de seguridad una Calificaci\u00f3n de Impacto de Seguridad (SIR) de Cr\u00edtica en lugar de Alta, como indica la puntuaci\u00f3n. La raz\u00f3n es que la explotaci\u00f3n de esta vulnerabilidad podr\u00eda resultar en que un atacante eleve privilegios a root.\nNota: Para explotar esta vulnerabilidad, el servicio WebDialer debe estar habilitado. WebDialer est\u00e1 deshabilitado por defecto."
    }
  ],
  "id": "CVE-2026-20230",
  "lastModified": "2026-07-22T19:10:00.120",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20230",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-03T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-03T18:16:20.160",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssrf-cXPnHcW"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://denizhalil.com/2026/06/12/cve-2026-20230-cisco-unified-cm-ssrf/"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20230"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    }
  ]
}



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