Cisco FMC Under Attack: A CVSS-10 Auth Bypass Rooted Your Firewall Brain Before Cisco Said So
A CVSS 10.0 hole in Cisco’s firewall manager is being exploited, and this time there is no “no evidence” line in the advisory Cisco confirmed this week that CVE-2026-20079, an authentication bypass in Cisco Secure Firewall Management Center (FMC), is under active exploitation. The score is the ugliest one in the book: CVSS 10.0. An…