cisco-sa-ftd-acl-bypass-8p6vFvwMediumCVSS 5.8

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Object Group Access Control List Bypass Vulnerabilities

Published
September 16, 2026
Last Modified
September 18, 2026

🔗 CVE IDs covered (2)

CVE-2026-20120 →CVE-2026-20121 →

📋 Description

Multiple vulnerabilities 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.

These vulnerabilities are due to a logic error in populating group access control policies (ACPs) with OGS configured. An attacker could exploit these vulnerabilities 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.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of September 16, 2026, Security Advisories ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-notice-jfxK98ZP"]. In addition, for further documentation of improvements and fixes in Cisco Secure Firewall products, see Cisco Secure Firewall Adaptive Security Appliance Software, Secure Firewall Threat Defense Software, and Secure Firewall Management Center Software Hardening Release: September 2026 ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN"].

CVE-2026-20120 — Cisco FTD ACL bypass vulnerability (CVSS 3.1 5.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N) CVE-2026-20121 — CIsco FTD Bypass Access List (CVSS 3.1 5.3, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C)

🎯 Affected products35

  • Cisco 3000 Series Industrial Security Appliances (ISA)
  • Cisco Adaptive Security Virtual Appliance (ASAv)
  • Cisco Firepower 1000 Series
  • Cisco Firepower 4100 Series
  • Cisco Firepower 9000 Series
  • Cisco Secure Firewall 1200 Series
  • Cisco Secure Firewall 3100 Series
  • Cisco Secure Firewall 4200 Series
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
  • Cisco Secure Firewall Threat Defense (FTD) Software
  • Cisco Secure Firewall Threat Defense Virtual
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.1
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.3
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.6
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.13
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.14
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.20
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.4
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.9
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.13
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.19
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.22
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.3
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.7
  • Cisco Secure Firewall Threat Defense (FTD) Software 7.6.0
  • Cisco Secure Firewall Threat Defense (FTD) Software 7.6.1
  • Cisco Secure Firewall Threat Defense (FTD) Software 7.6.2
  • +5 more not shown

✅ Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com Workarounds: There are no workarounds that address these vulnerabilities.

🔗 References (8)