Do Son Cisco Talos uncovers the FIRESTARTER backdoor in Arcane Door's latest attack on Firepower devices. Patch CVE-2025-20333 now to stop state-sponsored espionage.
CVE-2025-20333
Rapid7 exposed the unauthenticated RCE chain in Cisco ASA/FTD. CVE-2025-20362 bypasses auth to reach CVE-2025-20333, a buffer overflow in the WebVPN Lua script. Patch immediately.
Cisco patches a Critical 9.9 zero-day (CVE-2025-20333) in ASA/FTD VPN web servers. Authenticated attackers can exploit the flaw for root-level Remote Code Execution.