CVE-2026-20045CiscoServers and softwareJanuary 21, 2026

Cisco Unified Communications Products Code Injection Vulnerability

High 8.2Actively exploited

Description

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 contain a code injection vulnerability that could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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Details

Vendor
Cisco
Product
Cisco Unified Communications Manager
CVE
CVE-2026-20045
Affected versions
Unified CM 12.5: all 12.5
Unified CM 14: 14 before 14SU5 — fixed in 14SU5
Unified CM 15: from 15.0 to 15SU3a
Unified CM IM&P 12.5: all 12.5
Unified CM IM&P 14: 14 before 14SU5 — fixed in 14SU5
Unified CM IM&P 15: from 15.0 to 15SU3a
Unity Connection 12.5: all 12.5
Unity Connection 14: 14 before 14SU5 — fixed in 14SU5
Unity Connection 15: from 15.0 to 15SU3 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
8.2
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
February 11, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
January 21, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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