CRITICALAdvisorySep 12, 2026
Action required
Immediately patch Cisco FMC to the latest version addressing CVE-2026-20079 and CVE-2026-20316. In parallel, hunt for exploitation indicators: review FMC access logs for unauthenticated authentication bypass attempts, check for Qilin and Cyclops Blink IOCs on your network, and monitor for lateral movement from compromised FMC instances.
Affected products
Secure Firewall Management Center (FMC)Cisco
CVE IDs