Access Control Bypass Vulnerability in Cisco Firewall Products
CVE-2026-20120

5.8MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Secure Firewall Adaptive Security Appliance (asa) Software
Cisco Secure Firewall Threat Defense (ftd) Software
Vendor
CVE Published:
16 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-20120?

A vulnerability exists in the access control list (ACL) Object Group Search (OGS) within Cisco Secure Firewall Adaptive Security Appliance (ASA) and Cisco Secure Firewall Threat Defense (FTD) Software. This issue arises from a logic error when configuring group access control policies, potentially allowing unauthenticated remote attackers to exploit the flaw. By manipulating traffic that should have been blocked, an attacker may gain unauthorized access to protected network devices, leading to serious security risks.

Affected Version(s)

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.1

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.3

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
5.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.