Cisco Unified Communications Products Remote Code Execution Vulnerability (Cisco Cisco Unified Communications Manager)

CVE-2026-20045
HIGH 8.2CISA KEV ↗Exploited per ENISA since 2026-01-21

At a glance

Source
NVD
EPSS
EPSS 4.54 % · percentile 92 ()
State
PUBLISHED
Published
Updated
Assigner
cisco
NVD status
Analyzed

Description

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.

Weaknesses (CWE)

  • CWE-94 — Improper Control of Generation of Code

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Ncisco
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:NNVD · psirt@cisco.com (Secondary)
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Cisco · Cisco Unified Communications Manageraffected 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
Cisco · Cisco Unified Communications Manager IM and Presence Serviceaffected 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
Cisco · Cisco Unity Connectionaffected 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

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
CISA Known Exploited VulnerabilitiesCC0 1.0
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD