CVE-2026-20121
CIsco FTD Bypass Access List
Description
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.
INFO
Published Date :
Sept. 16, 2026, 8:24 p.m.
Last Modified :
Sept. 16, 2026, 8:24 p.m.
Remotely Exploit :
No
Source :
cisco
Affected Products
The following products are affected by CVE-2026-20121
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Cisco Secure Firewall software.
- Verify OGS configuration and ACPs.
- Test access controls thoroughly.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20121 vulnerability anywhere in the article.