CISA Advisory: CVE-2025-20333 for Cisco Firewall Devices
CVE-2025-20333 is a critical, actively exploited zero-day vulnerability impacting Cisco firewall devices, specifically those running unpatched versions of Cisco Adaptive Security Appliance (ASA) and Firewall Threat Defense (FTD) software. It is one of two zero-days currently being weaponized by cyber threat actors, posing a significant and immediate threat to enterprise network perimeters. The vulnerability has a CVSS score of base 9.9. At this time, NVD has not released a formal entry for CVE-2025-20333.