CVE-2026-20120: Cisco Secure Firewall Adaptive Security Appliance ASA Software

Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the access control list (ACL) Object Group Search (OGS) implementation of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured access controls. This vulnerability is due to a logic error in populating group access control policies (ACPs) with OGS configured. An attacker could exploit this vulnerability by sending traffic that should be blocked through the device. A successful exploit could allow the attacker to bypass access controls and reach devices in protected networks.

Affected products

• Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software: version 9.23.1 only; version 9.22.1.1 only; version 9.22.1.3 only; version 9.22.1.2 only; version 9.22.1.6 only; version 9.22.2 only; …
• Cisco Cisco Secure Firewall Threat Defense FTD Software: version 7.6.0 only; version 7.7.0 only; version 7.6.1 only; version 7.6.2 only; version 7.7.10 only; version 7.7.11 only; …

Published 2026-09-16. Last modified 2026-09-18.