OS Command Injection in Cisco Firewall Threat Defense (FTD) and Cisco Adaptive Security Appliance (ASA) - CVE-2026-20008
Published: March 6, 2026 / Updated: March 9, 2026
Vulnerability identifier: #VU123618
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20008
CWE-ID: CWE-78
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper input validation. A local privileged user can submit a specially crafting valid Lua code as a malicious parameter for a CLI command and execute arbitrary OS commands as root.
Affected software
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
How to mitigate CVE-2026-20008
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 7.0.9, 7.2.11, 7.4.4, 7.6.4, 7.7.11
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.85, 9.18.4.66, 9.20.4, 9.22.2.4, 9.23.1.7, 9.24.1
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.85, 9.18.4.66, 9.20.4, 9.22.2.4, 9.23.1.7, 9.24.1