CVE-2026-20045
Cisco Unified Communications Manager
Cisco Unified Communications Products Code Injection Vulnerability
What it is
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.
Vendor notices and references
- sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-m
- nvd.nist.gov/vuln/detail/CVE-2026-20045
Description and required action as published by CISA. Full record at NVD.
Other Cisco entries on the list
- BroadWorks Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability CVE-2026-20320 · Nov 10, 2026
- Secure Firewall ASA Software and Cisco Secure FTD Software Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability CVE-2026-76418 · Oct 29, 2026
- Secure Email Gateway Cisco Secure Email Gateway Relative Path Traversal Vulnerability CVE-2026-76519 · Oct 14, 2026
- Catalyst SD-WAN Manager Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability CVE-2026-76504 · Sep 30, 2026
- Identity Services Engine Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability CVE-2026-76460 · Sep 16, 2026
- Secure Email Gateway Cisco Secure Email Gateway SQL Injection Vulnerability CVE-2026-76461 · Sep 14, 2026