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

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.

Timeline

Scores

EPSS (exploitation in 30 days)

0.15% · top 95% of all CVEs (10 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.

Affected products

• Cisco · Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

  • affected 9.12.3
  • affected 9.12.1
  • affected 9.12.2
  • affected 9.12.4
  • affected 9.12.3.2
  • affected 9.12.3.7
  • affected 9.12.2.5
  • affected 9.12.3.12
  • affected 9.12.1.3
  • affected 9.12.2.4
  • affected 9.12.1.2
  • affected 9.12.2.9
  • affected 9.12.3.9
  • affected 9.12.2.1
  • affected 9.12.4.2
  • affected 9.12.4.4
  • affected 9.12.4.7
  • affected 9.12.4.8
  • affected 9.12.4.10
  • affected 9.12.4.13
  • affected 9.12.4.18
  • affected 9.12.4.24
  • affected 9.16.1
  • affected 9.12.4.26
  • affected 9.16.1.28
  • affected 9.12.4.29
  • affected 9.16.2
  • affected 9.12.4.30
  • affected 9.16.2.3
  • affected 9.12.4.35
  • affected 9.16.2.7
  • affected 9.12.4.37
  • affected 9.17.1
  • affected 9.16.2.11
  • affected 9.16.2.13
  • affected 9.12.4.39
  • affected 9.12.4.38
  • affected 9.16.2.14
  • affected 9.17.1.7
  • affected 9.12.4.40
  • and 107 more

• Cisco · Cisco Secure Firewall Threat Defense (FTD) Software

  • affected 6.4.0.1
  • affected 6.4.0.2
  • affected 6.4.0.5
  • affected 6.4.0
  • affected 6.4.0.3
  • affected 6.4.0.4
  • affected 6.4.0.6
  • affected 6.4.0.7
  • affected 6.4.0.8
  • affected 6.4.0.9
  • affected 6.4.0.10
  • affected 6.4.0.11
  • affected 6.4.0.12
  • affected 7.0.0
  • affected 7.0.0.1
  • affected 7.0.1
  • affected 7.1.0
  • affected 6.4.0.13
  • affected 7.0.1.1
  • affected 6.4.0.14
  • affected 7.1.0.1
  • affected 7.0.2
  • affected 6.4.0.15
  • affected 7.2.0
  • affected 7.0.2.1
  • affected 7.0.3
  • affected 7.1.0.2
  • affected 7.2.0.1
  • affected 7.0.4
  • affected 7.2.1
  • affected 7.0.5
  • affected 6.4.0.16
  • affected 7.3.0
  • affected 7.2.2
  • affected 7.2.3
  • affected 7.3.1
  • affected 7.1.0.3
  • affected 7.2.4
  • affected 7.0.6
  • affected 7.2.5
  • and 35 more

What to do

Exploitation: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2026-9428 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-20008](https://cveledger.app/badge/CVE-2026-20008.svg)](https://cveledger.app/cve/CVE-2026-20008)

Record last updated 5 Mar 2026, 14:05 UTC.