CVE-2026-20045
Actively exploited. CVE-2026-20045 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-01-21) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- The vulnerability allows an attacker to obtain user-level access and potentially elevate privileges to root through code injection.
- Who is affected
- Users of Cisco Unified Communications Manager and related products are affected.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Install the security updates provided by Cisco immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 90% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2026-20045: Cisco Unified Communications Products Code Injection Vulnerabilitycisa-kev · 2026-01-21
External references
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