Continued Evolution of Persistence Mechanism Against Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
On April 23, 2026, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) issued an update to V1: Emergency Directive (ED) 25-03: Identify and Mitigate Potential Compromise of Cisco Devices related to Cisco Secure Firewall Adaptive Security Appliance (ASA) and Cisco Secure Firewall Threat Defense (FTD) products. According to the update, the ArcaneDoor threat actor has developed a previously unknown persistence mechanism that is preserved across upgrading to the fixed releases that…
KEV ✓ EPSS 0.87 CVE-2025-20333 CVE-2025-20362 Cisco veřejná správa US