


High
CVE-2026-20045
Cisco
January 22, 2026
A critical Cisco Unified Communications flaw could allow unauthenticated remote code execution as root. Learn affected systems, risk levels, and mitigation steps.
Cisco Unified Communications
Network accessible, unauthenticated
Risk is High for large and medium government and business entities and Medium for smaller entities. Successful exploitation enables full system compromise, service disruption, credential theft, and potential pivoting to adjacent systems. Given confirmed exploitation attempts, exposed systems should be treated as high priority.
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