CVE-2026-20230 (GCVE-0-2026-20230)

Vulnerability from cvelistv5 – Published: 2026-06-03 16:09 – Updated: 2026-07-01 16:28
VLAI?
Title
Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability
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.
Severity ?
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
Cisco Cisco Unified Communications Manager Affected: 14
Affected: 14SU1
Affected: 14SU2
Affected: 14SU3
Affected: 15
Affected: 15SU1
Affected: 14SU4
Affected: 14SU4a
Affected: 15SU1a
Affected: 15SU2
Affected: 15.0.1.13010-1
Affected: 15.0.1.13011-1
Affected: 15.0.1.13012-1
Affected: 15.0.1.13013-1
Affected: 15.0.1.13014-1
Affected: 15.0.1.13015-1
Affected: 15.0.1.13016-1
Affected: 15.0.1.13017-1
Affected: 15SU3a
Affected: 14SU5
Affected: 15SU4
Affected: 15SU4a
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20230",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-26T03:55:19.730Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://denizhalil.com/2026/06/12/cve-2026-20230-cisco-unified-cm-ssrf/"
          },
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20230"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability that is described in this advisory.\r\n\r\nIn June 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-01T16:28:16.838Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-cucm-ssrf-cXPnHcW",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssrf-cXPnHcW"
        }
      ],
      "source": {
        "advisory": "cisco-sa-cucm-ssrf-cXPnHcW",
        "defects": [
          "CSCws67331"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20230",
    "datePublished": "2026-06-03T16:09:45.961Z",
    "dateReserved": "2025-10-08T11:59:15.399Z",
    "dateUpdated": "2026-07-01T16:28:16.838Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2026-20230",
      "cwes": "[\"CWE-918\"]",
      "dateAdded": "2026-06-25",
      "dueDate": "2026-06-28",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-cucm-ssrf-cXPnHcW.html ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20230",
      "product": "Unified Communications Manager",
      "requiredAction": "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.",
      "shortDescription": "Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) contain a server-side request forgery (SSRF) Vulnerability that could allow an unauthenticated, remote attacker to write files to the underlying operating system that could be used later to elevate to root.",
      "vendorProject": "Cisco",
      "vulnerabilityName": "Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20230\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-25T19:50:08.910362Z\"}}}], \"references\": [{\"url\": \"https://denizhalil.com/2026/06/12/cve-2026-20230-cisco-unified-cm-ssrf/\", \"tags\": [\"exploit\"]}, {\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20230\", \"tags\": [\"government-resource\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-03T17:36:57.584Z\"}}], \"cna\": {\"title\": \"Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability\", \"source\": {\"defects\": [\"CSCws67331\"], \"advisory\": \"cisco-sa-cucm-ssrf-cXPnHcW\", \"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Unified Communications Manager\", \"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\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability that is described in this advisory.\\r\\n\\r\\nIn June 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssrf-cXPnHcW\", \"name\": \"cisco-sa-cucm-ssrf-cXPnHcW\"}], \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-918\", \"description\": \"Server-Side Request Forgery (SSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-07-01T16:28:16.838Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20230\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-01T16:28:16.838Z\", \"dateReserved\": \"2025-10-08T11:59:15.399Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-06-03T16:09:45.961Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.



Detection rules are retrieved from Rulezet.