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Cisco Unified Communications 0

Cyberpress • January 22, 2026

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Cisco has issued a critical security advisory warning of an actively exploited zero-day vulnerability affecting multiple Unified Communications ...

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Cisco Issues Warning for Critical Zero-Day Vulnerability in Unified Communications Cisco has disclosed a critical zero-day remote code execution vulnerability, CVE-2026-20045, affecting multiple Unified Communications products. This flaw allows unauthenticated attackers to execute arbitrary commands on the underlying operating system, potentially gaining root access. The Cisco Product Security Incident Response Team (PSIRT) has confirmed active exploitation attempts and urges immediate patching. 4 sources 84

Extracted Entities

Attack Types (1)

Zero-day Exploit

Companies (1)

Platforms (1)

Cisco Unified Communications