Cisco FTD

Cisco ASA and FTD Face DoS Vulnerability in SSL VPN Already Exploited in the Wild

Cisco Systems has disclosed a denial-of-service vulnerability affecting its Cisco Secure Firewall ASA and Cisco Secure Firewall FTD products. The flaw, tracked as CVE-2026-76418, resides in the SSL VPN remote access feature and carries a CVSS v3.1 base score of 8.6, rated High severity. Exploitation occurs when secondary authentication is configured on tunnel groups, allowing an attacker to send a crafted request that forces a device reboot without requiring authentication. Cisco confirmed active exploitation of the issue in October 2026. Security updates addressing the vulnerability are now available for both affected product lines. The advisory recommends immediate application of the patches to prevent service disruption.

CVE-2026-20349: Cisco ASA and FTD Firewalls Face Remote DoS in SSL VPN, Already Exploited

Cisco has disclosed a high-severity denial-of-service vulnerability affecting its Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense products. The flaw, tracked as CVE-2026-20349, resides in the SSL VPN component and allows unauthenticated remote attackers to trigger device reboots by sending specially crafted HTTP requests. The issue also impacts FTD deployments using Zero Trust Network Access. With a CVSS v3.1 base score of 8.6, the vulnerability has already been observed in active exploitation campaigns since August 2026. Cisco released hotfixes for both affected platforms and strongly urges immediate updates, while confirming that Secure Firewall Management Center remains unaffected.