Cisco Addresses Actively Exploited Zero-Day Flaw in Firewall Software

Cisco has released security updates for a high-severity zero-day vulnerability (CVE-2026-76418) in its Secure Firewall ASA and FTD software, which is currently being exploited. The flaw allows unauthenticated remote attackers to force a firewall reload, causing a denial-of-service (DoS) condition and disrupting remote access. This critical vulnerability stems from logic errors in the Remote Access SSL VPN service when secondary authentication is configured.