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EUVD-2026-270930

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:03

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:03:03.675319+00:00",
  "id": "EUVD-2026-270930"
}

CVE-2026-20045 (GCVE-0-2026-20045)

Vulnerability from cvelistv5 – Published: 2026-01-21 16:26 – Updated: 2026-02-26 14:44

Title

Cisco Unified Communications Products Remote Code Execution Vulnerability

Summary

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. This 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. 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.

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

SSVC

Exploitation: active Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-22 04:55 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

cisco mitre root Scorecard

References

2 references

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

3 products

Vendor	Product	Version
Cisco	Cisco Unified Communications Manager	Affected: 12.5(1)SU2 Affected: 12.5(1)SU1 Affected: 12.5(1) Affected: 12.5(1)SU3 Affected: 12.5(1)SU4 Affected: 14 Affected: 12.5(1)SU5 Affected: 14SU1 Affected: 12.5(1)SU6 Affected: 14SU2 Affected: 12.5(1)SU7 Affected: 12.5(1)SU7a Affected: 14SU3 Affected: 12.5(1)SU8 Affected: 12.5(1)SU8a Affected: 15 Affected: 15SU1 Affected: 14SU4 Affected: 14SU4a Affected: 15SU1a Affected: 12.5(1)SU9 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
Cisco	Cisco Unified Communications Manager IM and Presence Service	Affected: 12.5(1) Affected: 12.5(1)SU1 Affected: 12.5(1)SU2 Affected: 12.5(1)SU3 Affected: 12.5(1)SU4 Affected: 14 Affected: 12.5(1)SU5 Affected: 14SU1 Affected: 12.5(1)SU6 Affected: 14SU2 Affected: 14SU2a Affected: 12.5(1)SU7 Affected: 14SU3 Affected: 12.5(1)SU8 Affected: 15 Affected: 15SU1 Affected: 14SU4 Affected: 12.5(1)SU9 Affected: 15SU2 Affected: 15SU3
Cisco	Cisco Unity Connection	Affected: 12.5(1) Affected: 12.5(1)SU1 Affected: 12.5(1)SU2 Affected: 12.5(1)SU3 Affected: 12.5(1)SU4 Affected: 14 Affected: 12.5(1)SU5 Affected: 14SU1 Affected: 12.5(1)SU6 Affected: 14SU2 Affected: 12.5(1)SU7 Affected: 14SU3 Affected: 12.5(1)SU8 Affected: 14SU3a Affected: 12.5(1)SU8a Affected: 15 Affected: 15SU1 Affected: 14SU4 Affected: 12.5(1)SU9 Affected: 15SU2 Affected: 15SU3

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20045",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-22T04:55:44.107919Z",
                "version": "2.0.3"
              },
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            }
          },
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              "content": {
                "dateAdded": "2026-01-21",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20045"
              },
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        "providerMetadata": {
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        "references": [
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            "tags": [
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            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20045"
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            "time": "2026-01-21T00:00:00.000Z",
            "value": "CVE-2026-20045 added to CISA KEV"
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      }
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              "status": "affected",
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              "version": "12.5(1)SU9"
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              "version": "15SU2"
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            {
              "status": "affected",
              "version": "15.0.1.13011-1"
            },
            {
              "status": "affected",
              "version": "15.0.1.13012-1"
            },
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              "version": "15.0.1.13013-1"
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            {
              "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"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Cisco Unified Communications Manager IM and Presence Service",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "12.5(1)"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU1"
            },
            {
              "status": "affected",
              "version": "12.5(1)SU2"
            },
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              "status": "affected",
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            },
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              "version": "12.5(1)SU5"
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            {
              "status": "affected",
              "version": "14SU1"
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              "version": "12.5(1)SU6"
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              "version": "14SU2"
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              "status": "affected",
              "version": "14SU2a"
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              "version": "12.5(1)SU7"
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              "status": "affected",
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              "status": "affected",
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            },
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              "status": "affected",
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            },
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            },
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            },
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              "version": "15SU2"
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            }
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      ],
      "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 \u0026amp; Presence Service (Unified CM IM\u0026amp;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.\u0026nbsp;\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.\u0026nbsp;\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."
        }
      ],
      "exploits": [
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          "value": "The Cisco PSIRT is aware of attempted exploitation of this vulnerability in the wild. Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability."
        }
      ],
      "metrics": [
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            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
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          },
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "Improper Control of Generation of Code (\u0027Code Injection\u0027)",
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              "type": "cwe"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-13T20:33:31.808Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
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      "references": [
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          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-mORhqY4b"
        }
      ],
      "source": {
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        "defects": [
          "CSCwr21851"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco Unified Communications Products Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20045",
    "datePublished": "2026-01-21T16:26:20.312Z",
    "dateReserved": "2025-10-08T11:59:15.354Z",
    "dateUpdated": "2026-02-26T14:44:34.950Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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EUVD-2026-270930

CVE-2026-20045 (GCVE-0-2026-20045)

Tags

Sightings

Nomenclature

Related by attack behaviour