CISA has added CVE-2026-20045, a critical zero-day remote code execution (RCE) vulnerability in Cisco Unified Communications Manager (Unified CM), to its Known Exploited Vulnerabilities (KEV) catalog. Added on January 21, 2026, this flaw affects multiple Cisco Unified Communications products, including Unified CM, Unified CM Session Management Edition (SME), Unified CM IM & Presence Service, Cisco […]

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