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TI-2026-16227 Aliases CVE-2026-20008GHSA-42hx-qv2c-ff49

OS command injection in Cisco Secure Firewall Adaptive Security Appliance Software

Priority LOW 28CWE-78Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00154 4th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) Software9.12.3; 9.12.1; 9.12.2; 9.12.4; 9.12.3.2; 9.12.3.7; 9.12.2.5; 9.12.3.12; 9.12.1.3; 9.12.2.4; 9.12.1.2; 9.12.2.9; 9.12.3.9; 9.12.2.1; 9.12.4.2; 9.12.4.4; 9.12.4.7; 9.12.4.8; 9.12.4.10; 9.12.4.13; 9.12.4.18; 9.12.4.24; 9.16.1; 9.12.4.26; 9.16.1.28; 9.12.4.29; 9.16.2; 9.12.4.30; 9.16.2.3; 9.12.4.35; 9.16.2.7; 9.12.4.37; 9.17.1; 9.16.2.11; 9.16.2.13; 9.12.4.39; 9.12.4.38; 9.16.2.14; 9.17.1.7; 9.12.4.40; 9.16.3.3; 9.16.3; 9.16.3.14; 9.17.1.9; 9.12.4.41; 9.17.1.10; 9.18.1; 9.12.4.47; 9.16.3.15; 9.18.1.3; 9.17.1.11; 9.12.4.48; 9.18.2; 9.16.3.19; 9.17.1.13; 9.12.4.50; 9.17.1.15; 9.12.4.52; 9.16.3.23; 9.18.2.5; 9.16.4; 9.12.4.54; 9.17.1.20; 9.18.2.7; 9.19.1; 9.16.4.9; 9.12.4.55; 9.18.2.8; 9.16.4.14; 9.18.3; 9.19.1.5; 9.12.4.56; 9.17.1.30; 9.19.1.9; 9.18.3.39; 9.16.4.19; 9.12.4.58; 9.19.1.12; 9.18.3.46; 9.16.4.27; 9.19.1.18; 9.18.3.53; 9.18.3.55; 9.16.4.38; 9.17.1.33; 9.12.4.62; 9.16.4.39; 9.18.3.56; 9.20.1; 9.16.4.42; 9.19.1.22; 9.18.4; 9.20.1.5; 9.18.4.5; 9.19.1.24; 9.16.4.48; 9.18.4.8; 9.20.2; 9.19.1.27; 9.12.4.65; 9.16.4.55; 9.18.4.22; 9.20.2.10; 9.16.4.57; 9.19.1.28; 9.17.1.39; 9.12.4.67; 9.18.4.24; 9.20.2.21; 9.16.4.61; 9.19.1.31; 9.18.4.29; 9.20.2.22; 9.16.4.62; 9.18.4.34; 9.20.3; 9.16.4.67; 9.16.4.70; 9.18.4.40; 9.23.1; 9.22.1.1; 9.16.4.71; 9.20.3.4; 9.18.4.47; 9.20.3.7; 9.17.1.45; 9.19.1.37; 9.17.1.46; 9.16.4.76; 9.20.3.9; 9.19.1.38; 9.18.4.50; 9.22.1.3; 9.20.3.10; 9.22.1.2; 9.18.4.52; 9.20.3.13; 9.22.1.6; 9.18.4.53; 9.16.4.82; 9.22.2; 9.20.3.16; 9.19.1.42; 9.18.4.57; 9.16.4.84; 9.23.1.3; 9.20.3.20—No fix listedCNA
CiscoCisco Secure Firewall Threat Defense (FTD) Software6.4.0.1; 6.4.0.2; 6.4.0.5; 6.4.0; 6.4.0.3; 6.4.0.4; 6.4.0.6; 6.4.0.7; 6.4.0.8; 6.4.0.9; 6.4.0.10; 6.4.0.11; 6.4.0.12; 7.0.0; 7.0.0.1; 7.0.1; 7.1.0; 6.4.0.13; 7.0.1.1; 6.4.0.14; 7.1.0.1; 7.0.2; 6.4.0.15; 7.2.0; 7.0.2.1; 7.0.3; 7.1.0.2; 7.2.0.1; 7.0.4; 7.2.1; 7.0.5; 6.4.0.16; 7.3.0; 7.2.2; 7.2.3; 7.3.1; 7.1.0.3; 7.2.4; 7.0.6; 7.2.5; 7.2.4.1; 7.3.1.1; 7.4.0; 6.4.0.17; 7.0.6.1; 7.2.5.1; 7.4.1; 7.2.6; 7.0.6.2; 7.4.1.1; 6.4.0.18; 7.2.7; 7.2.5.2; 7.3.1.2; 7.2.8; 7.6.0; 7.4.2; 7.2.8.1; 7.0.6.3; 7.4.2.1; 7.2.9; 7.0.7; 7.7.0; 7.4.2.2; 7.2.10; 7.6.1; 7.4.2.3; 7.0.8; 7.6.2; 7.7.10; 7.0.8.1; 7.6.2.1; 7.7.10.1; 7.4.2.4; 7.2.10.2—No fix listedCNA
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software VendorCisco Affected 9.12.3; 9.12.1; 9.12.2; 9.12.4; 9.12.3.2; 9.12.3.7; 9.12.2.5; 9.12.3.12; 9.12.1.3; 9.12.2.4; 9.12.1.2; 9.12.2.9; 9.12.3.9; 9.12.2.1; 9.12.4.2; 9.12.4.4; 9.12.4.7; 9.12.4.8; 9.12.4.10; 9.12.4.13; 9.12.4.18; 9.12.4.24; 9.16.1; 9.12.4.26; 9.16.1.28; 9.12.4.29; 9.16.2; 9.12.4.30; 9.16.2.3; 9.12.4.35; 9.16.2.7; 9.12.4.37; 9.17.1; 9.16.2.11; 9.16.2.13; 9.12.4.39; 9.12.4.38; 9.16.2.14; 9.17.1.7; 9.12.4.40; 9.16.3.3; 9.16.3; 9.16.3.14; 9.17.1.9; 9.12.4.41; 9.17.1.10; 9.18.1; 9.12.4.47; 9.16.3.15; 9.18.1.3; 9.17.1.11; 9.12.4.48; 9.18.2; 9.16.3.19; 9.17.1.13; 9.12.4.50; 9.17.1.15; 9.12.4.52; 9.16.3.23; 9.18.2.5; 9.16.4; 9.12.4.54; 9.17.1.20; 9.18.2.7; 9.19.1; 9.16.4.9; 9.12.4.55; 9.18.2.8; 9.16.4.14; 9.18.3; 9.19.1.5; 9.12.4.56; 9.17.1.30; 9.19.1.9; 9.18.3.39; 9.16.4.19; 9.12.4.58; 9.19.1.12; 9.18.3.46; 9.16.4.27; 9.19.1.18; 9.18.3.53; 9.18.3.55; 9.16.4.38; 9.17.1.33; 9.12.4.62; 9.16.4.39; 9.18.3.56; 9.20.1; 9.16.4.42; 9.19.1.22; 9.18.4; 9.20.1.5; 9.18.4.5; 9.19.1.24; 9.16.4.48; 9.18.4.8; 9.20.2; 9.19.1.27; 9.12.4.65; 9.16.4.55; 9.18.4.22; 9.20.2.10; 9.16.4.57; 9.19.1.28; 9.17.1.39; 9.12.4.67; 9.18.4.24; 9.20.2.21; 9.16.4.61; 9.19.1.31; 9.18.4.29; 9.20.2.22; 9.16.4.62; 9.18.4.34; 9.20.3; 9.16.4.67; 9.16.4.70; 9.18.4.40; 9.23.1; 9.22.1.1; 9.16.4.71; 9.20.3.4; 9.18.4.47; 9.20.3.7; 9.17.1.45; 9.19.1.37; 9.17.1.46; 9.16.4.76; 9.20.3.9; 9.19.1.38; 9.18.4.50; 9.22.1.3; 9.20.3.10; 9.22.1.2; 9.18.4.52; 9.20.3.13; 9.22.1.6; 9.18.4.53; 9.16.4.82; 9.22.2; 9.20.3.16; 9.19.1.42; 9.18.4.57; 9.16.4.84; 9.23.1.3; 9.20.3.20 Fixed in — No fix listed CNA
  • Cisco Secure Firewall Threat Defense (FTD) Software VendorCisco Affected 6.4.0.1; 6.4.0.2; 6.4.0.5; 6.4.0; 6.4.0.3; 6.4.0.4; 6.4.0.6; 6.4.0.7; 6.4.0.8; 6.4.0.9; 6.4.0.10; 6.4.0.11; 6.4.0.12; 7.0.0; 7.0.0.1; 7.0.1; 7.1.0; 6.4.0.13; 7.0.1.1; 6.4.0.14; 7.1.0.1; 7.0.2; 6.4.0.15; 7.2.0; 7.0.2.1; 7.0.3; 7.1.0.2; 7.2.0.1; 7.0.4; 7.2.1; 7.0.5; 6.4.0.16; 7.3.0; 7.2.2; 7.2.3; 7.3.1; 7.1.0.3; 7.2.4; 7.0.6; 7.2.5; 7.2.4.1; 7.3.1.1; 7.4.0; 6.4.0.17; 7.0.6.1; 7.2.5.1; 7.4.1; 7.2.6; 7.0.6.2; 7.4.1.1; 6.4.0.18; 7.2.7; 7.2.5.2; 7.3.1.2; 7.2.8; 7.6.0; 7.4.2; 7.2.8.1; 7.0.6.3; 7.4.2.1; 7.2.9; 7.0.7; 7.7.0; 7.4.2.2; 7.2.10; 7.6.1; 7.4.2.3; 7.0.8; 7.6.2; 7.7.10; 7.0.8.1; 7.6.2.1; 7.7.10.1; 7.4.2.4; 7.2.10.2 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*9.12.1 to before 9.16.4.85; 9.17.1 to before 9.18.4.66; 9.19.1 to before 9.20.4; 9.22.1.1 to before 9.22.2.4; 9.23.1 to before 9.23.1.7VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*6.4.0 to before 7.0.9; 7.1.0 to before 7.2.11; 7.3.0 to before 7.4.3; 7.6.0 to before 7.6.4; 7.7.0 to before 7.7.11VulnerableCisco
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* Versions 9.12.1 to before 9.16.4.85; 9.17.1 to before 9.18.4.66; 9.19.1 to before 9.20.4; 9.22.1.1 to before 9.22.2.4; 9.23.1 to before 9.23.1.7 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions 6.4.0 to before 7.0.9; 7.1.0 to before 7.2.11; 7.3.0 to before 7.4.3; 7.6.0 to before 7.6.4; 7.7.0 to before 7.7.11 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20008
  2. 2026-10-03 Alias added: GHSA-42hx-qv2c-ff49

References

Advisory 1

  • TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
  • TI-2016-05454 Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on… KEVCVSS 3.1HIGH 8.8
  • TI-2023-06973 Authentication bypass in Cisco Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.1
  • TI-2026-82192 Denial of service in Cisco Secure Firewall ASA and FTD SSL VPN KEVCVSS 3.1HIGH 8.6
  • TI-2026-16533 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense… KEVCVSS 3.1HIGH 8.6
  • TI-2025-14657 Missing authorization in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1HIGH 8.6
See all 354 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences