Denial of Service Vulnerability in Cisco Secure Firewall Adaptive Security Appliance Software

CVE-2026-20082

What is CVE-2026-20082?

This vulnerability arises from improper management of incoming TCP connections on Cisco's Secure Firewall ASA Software, specifically during a TCP SYN flood attack. By exploiting this flaw, an attacker can send a carefully crafted traffic stream, preventing the establishment of all incoming TCP connections, including those necessary for remote management access and Remote Access VPN connections. Consequently, this leads to a denial of service condition, affecting all TCP-based network protocols reliant on these connections.

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