Cisco Secure Firewall ASA/FTD Remote Access SSL VPN Tunnel Denial-of-Service Vulnerability

A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall ASA and FTD Software could allow an unauthenticated remote attacker to unexpectedly reload the device and cause a denial-of-service (DoS) condition. Cisco PSIRT stated that it became aware of active exploitation of this vulnerability in October 2026.