Vulnerability Monitor

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CVE-2026-20008


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.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.0, requiring local system access to exploit with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), for affected systems. Impacting 2 products from cisco, from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2026-03-04T18:16:14.383

Last Modified

2026-04-16T20:13:21.140

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.0 (MEDIUM)

Weaknesses
  • Type: Primary
    CWE-78

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco adaptive_security_appliance_software < 9.16.4.85 Yes
Operating System cisco adaptive_security_appliance_software < 9.18.4.66 Yes
Operating System cisco adaptive_security_appliance_software < 9.20.4 Yes
Operating System cisco adaptive_security_appliance_software < 9.22.2.4 Yes
Operating System cisco adaptive_security_appliance_software < 9.23.1.7 Yes
Application cisco firepower_threat_defense_software < 7.0.9 Yes
Application cisco firepower_threat_defense_software < 7.2.11 Yes
Application cisco firepower_threat_defense_software < 7.4.3 Yes
Application cisco firepower_threat_defense_software < 7.6.4 Yes
Application cisco firepower_threat_defense_software < 7.7.11 Yes

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.