Cisco Firewall 0-day Vulnerability Exploited in the Wild to Deploy Interlock Ransomware

An active campaign by the Interlock ransomware group is exploiting a critical zero-day vulnerability (CVE-2026-20131) in Cisco Secure Firewall Management Center (FMC) Software. Cisco disclosed the flaw on March 4, 2026; it allows unauthenticated remote attackers to execute arbitrary Java code as root. Amazon threat intelligence researchers discovered Interlock exploiting this vulnerability 36 days before […]

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