A critical zero-day vulnerability in Cisco Secure Firewall Management Center (FMC) is being actively exploited by threat actors to deploy Interlock ransomware across enterprise networks, according to recent security research. The flaw, tracked as CVE-2026-20131, has been abused in real-world attacks for over a month before public disclosure, giving attackers a significant operational advantage. The […] The post Cisco Firewall Zero-Day Actively Exploited to Deliver Interlock Ransomware appeared first on Cyber Security News.