CVE-2026-20079: Critical Authentication Bypass in Cisco Secure FMC
July 30, 2026
CVE-2026-20079 is a critical authentication bypass vulnerability (CVSS 10.0) in Cisco Secure Firewall Management Center Software. It allows execution of arbitrary executable script files to obtain root access. Cisco updated its advisory with additional indicators and hot fixes, though no malicious exploitation is known.