{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20045", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.354Z", "datePublished": "2026-01-21T16:26:20.312Z", "dateUpdated": "2026-01-21T17:21:42.282Z"}, "containers": {"cna": {"title": "Cisco Unified Communications Products Remote Code Execution Vulnerability", "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "baseScore": 8.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}}], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. \r\n\r\nThis vulnerability is due to improper validation of user-supplied input in HTTP requests. 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Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability."}], "source": {"advisory": "cisco-sa-voice-rce-mORhqY4b", "discovery": "EXTERNAL", "defects": ["CSCwr21851"]}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Control of Generation of Code ('Code Injection')", "type": "cwe", "cweId": "CWE-94"}]}], "affected": [{"vendor": "Cisco", "product": "Cisco Unified Communications Manager", "versions": [{"version": "12.5(1)SU2", "status": "affected"}, {"version": "12.5(1)SU1", "status": "affected"}, {"version": "12.5(1)", "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": "12.5(1)SU7a", "status": "affected"}, {"version": "14SU3", "status": "affected"}, {"version": "12.5(1)SU8", "status": "affected"}, {"version": "12.5(1)SU8a", "status": "affected"}, {"version": "15", "status": "affected"}, {"version": "15SU1", "status": "affected"}, {"version": "14SU4", "status": "affected"}, {"version": "14SU4a", "status": "affected"}, {"version": "15SU1a", "status": "affected"}, {"version": "12.5(1)SU9", "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"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Unified Communications Manager IM and Presence Service", "versions": [{"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": "14SU2a", "status": "affected"}, {"version": "12.5(1)SU7", "status": "affected"}, {"version": "14SU3", "status": "affected"}, {"version": "12.5(1)SU8", "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", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Unity Connection", "versions": [{"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", "status": "affected"}], "defaultStatus": "unknown"}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-01-21T16:26:20.312Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-21T17:21:35.865613Z", "id": "CVE-2026-20045", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-21T17:21:42.282Z"}}]}}

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An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root.\r\nNote: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. 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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. \r\n\r\nThis vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges 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."}], "id": "CVE-2026-20045", "lastModified": "2026-01-21T17:16:08.077", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "psirt@cisco.com", "type": "Primary"}]}, "published": "2026-01-21T17:16:08.077", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-mORhqY4b"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "psirt@cisco.com", "type": "Primary"}]}

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