Cisco FMC Flaws Exploited to Deploy Qilin Ransomware

Three distinct threat clusters are actively exploiting vulnerabilities in Cisco Secure Firewall Management Center, most notably the critical authentication bypass CVE-2026-20079. Attackers leverage these flaws to harvest credentials and deploy Qilin ransomware across compromised environments. Administrators are strongly urged to apply the latest security patches immediately to secure their network infrastructure.