CVE-2026-20045
Cisco Unified Communications Products Code Injection Vulnerability
CVSS
—
No CVSS
EPSS
4.4%
p91
KEV
YES
Jan 21, 2026
Exploit Today
77
0-100
Published: — · Last modified: —
Product
Cisco / Unified Communications Manager
Vulnerability
Cisco Unified Communications Products Code Injection Vulnerability
Added to KEV
Jan 21, 2026
Remediate by
Feb 11, 2026
Known ransomware use
No
Summary 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.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-mORhqY4b ; https://nvd.nist.gov/vuln/detail/CVE-2026-20045