cisco-sa-asaftd-luainject-VescqgmSMediumCVSS 6.0

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Lua Code Injection Vulnerability

Published
March 4, 2026
Last Modified
March 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-20008 →

📋 Description

A vulnerability in a small subset of CLI commands that are used on Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, local attacker to craft Lua code that could be used on the underlying operating system as root.

This vulnerability exists because user-provided input is not properly sanitized. An attacker could exploit this vulnerability by crafting valid Lua code and submitting it as a malicious parameter for a CLI command. A successful exploit could allow the attacker to inject Lua code, which could lead to arbitrary code execution as the root user. To exploit this vulnerability, an attacker must have valid Administrator credentials.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is part of the March 2026 release of the Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2026 Semiannual Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75736"].

CVE-2026-20008 — Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Lua Code Injection Vulnerability (CVSS 3.1 6.0, CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N)

🎯 Affected products236

  • Cisco 3000 Series Industrial Security Appliances (ISA)
  • Cisco ASA 5500-X Series Firewalls
  • Cisco Adaptive Security Virtual Appliance (ASAv)
  • Cisco Firepower 1000 Series
  • Cisco Firepower 2100 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 9.12.1
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.4
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18
  • +206 more not shown

✅ Remediation

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

🔗 References (7)