CVE-2026-20120: Cisco FTD ACL bypass vulnerability
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 Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Cisco Secure Firewall ASA Software and Cisco Secure Firewall FTD Software deployments are affected when group access control policies use ACL Object Group Search (OGS). The issue can allow traffic that should be blocked to pass through the device toward protected networks.
What does an attacker need to exploit it?
An attacker can exploit the issue remotely and without authentication by sending traffic that the configured access controls should block. No user interaction is required.
What is the practical impact of a successful exploit?
Successful exploitation bypasses configured access controls, potentially allowing the attacker to reach devices in protected networks. The provided severity vector indicates an integrity impact, with no stated confidentiality or availability impact.