Answer in brief
CVE-2026-20045 records a High severity (CVSS 8.2) vulnerability in Cisco Unified Communications Products Remote Code Execution Vulnerability. The current sources mark it as known exploited. The current feed maps Cisco/Cisco Unified Communications Manager (generic), Cisco/Cisco Unified Communications Manager IM and Presence Service (generic), Cisco/Cisco Unity Connection (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.2. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco Unified Communications Manager (generic), Cisco/Cisco Unified Communications Manager IM and Presence Service (generic), Cisco/Cisco Unity Connection (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Unified Communications Managergeneric | 12.5(1)SU2 || 12.5(1)SU1 || 12.5(1) || 12.5(1)SU3 || 12.5(1)SU4 || 14 || 12.5(1)SU5 || 14SU1 || 12.5(1)SU6 || 14SU2 || 12.5(1)SU7 || 12.5(1)SU7a || 14SU3 || 12.5(1)SU8 || 12.5(1)SU8a || 15 || 15SU1 || 14SU4 || 14SU4a || 15SU1a || 12.5(1)SU9 || 15SU2 || 15.0.1.13010-1 || 15.0.1.13011-1 || 15.0.1.13012-1 || 15.0.1.13013-1 || 15.0.1.13014-1 || 15.0.1.13015-1 || 15.0.1.13016-1 || 15.0.1.13017-1 || 15SU3a | Not reported |
| Cisco/Cisco Unified Communications Manager IM and Presence Servicegeneric | 12.5(1) || 12.5(1)SU1 || 12.5(1)SU2 || 12.5(1)SU3 || 12.5(1)SU4 || 14 || 12.5(1)SU5 || 14SU1 || 12.5(1)SU6 || 14SU2 || 14SU2a || 12.5(1)SU7 || 14SU3 || 12.5(1)SU8 || 15 || 15SU1 || 14SU4 || 12.5(1)SU9 || 15SU2 || 15SU3 | Not reported |
| Cisco/Cisco Unity Connectiongeneric | 12.5(1) || 12.5(1)SU1 || 12.5(1)SU2 || 12.5(1)SU3 || 12.5(1)SU4 || 14 || 12.5(1)SU5 || 14SU1 || 12.5(1)SU6 || 14SU2 || 12.5(1)SU7 || 14SU3 || 12.5(1)SU8 || 14SU3a || 12.5(1)SU8a || 15 || 15SU1 || 14SU4 || 12.5(1)SU9 || 15SU2 || 15SU3 | Not reported |
Published upstream
Jan 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Feb 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Jan 21, 2026
Evidence: source:kev:kev:kev:recordA 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.
Quoted source text, attributed separately from HOL analysis.