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Cisco has released fresh patches to address what it described as a "critical" security vulnerability impacting multiple Unified Communications (CM) products and Webex Calling Dedicated Instance that it has been actively exploited as a zero-day in the wild

The Hacker News 22 Jan 2026, 5:06 p.m. Actively exploited CVE-2026-20045 0-Day CVE Cisco Critical Patch Unauthenticated Vulnerability