Cisco FMC Software Authentication Bypass Vulnerability Allows Root Access
Cisco disclosed a critical authentication bypass vulnerability in Secure Firewall Management Center (FMC) Software. An unauthenticated, remote attacker could send crafted HTTP requests to execute scripts and obtain root access to the underlying operating system. Cisco released software updates to address CVE-2026-20079. No workarounds exist. The advisory is part of Cisco's March 2026 semiannual firewall security publication.
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