---
id: CVE-2019-15992
title: >-
  A vulnerability in the implementation of the Lua interpreter integrated in
  Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat
  Defense (FTD) Software could allow an authenticated, remote attacker to
  execute arbitr…
summary: >-
  A vulnerability in the implementation of the Lua interpreter integrated in
  Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat
  Defense (FTD) Software could allow an authenticated, remote attacker to
  execute arbitr…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-787
vendor: cisco
product: adaptive_security_appliance
affected:
  - adaptive_security_appliance < 9.6.4.36
  - 'adaptive_security_appliance_software >= 9.7, < 9.8.4.15'
  - 'adaptive_security_appliance_software >= 9.9, < 9.9.2.61'
  - 'adaptive_security_appliance_software >= 9.10, < 9.10.1.32'
  - 'adaptive_security_appliance_software >= 9.12, < 9.12.3'
  - 'adaptive_security_appliance_software >= 9.13, < 9.13.1.4'
  - 'adaptive_security_appliance_software >= 9.14, < 9.14.2.7'
  - 'adaptive_security_appliance_software >= 9.15, < 9.15.1.4'
  - secure_firewall_management_center < 6.2.3.16
  - 'secure_firewall_management_center >= 6.3.0, < 6.3.0.6'
  - 'secure_firewall_management_center >= 6.4.0, < 6.4.0.7'
  - 'secure_firewall_management_center >= 6.5.0, < 6.5.0.2'
  - secure_firewall_threat_defense
patched:
  - adaptive_security_appliance 9.6.4.36
  - adaptive_security_appliance_software 9.15.1.4
  - secure_firewall_management_center 6.5.0.2
published: '2020-09-23'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-15992'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191112-asa-ftd-lua-rce
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191112-asa-ftd-lua-rce
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.04122
epssPercentile: 0.90344
ingestedAt: '2026-08-11T19:48:28.312Z'
---

## Overview

A vulnerability in the implementation of the Lua interpreter integrated in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code with root privileges on the underlying Linux operating system of an affected device. The vulnerability is due to insufficient restrictions on the allowed Lua function calls within the context of user-supplied Lua scripts. A successful exploit could allow the attacker to trigger a heap overflow condition and execute arbitrary code with root privileges on the underlying Linux operating system of an affected device.

## Affected

- `adaptive_security_appliance < 9.6.4.36`
- `adaptive_security_appliance_software >= 9.7, < 9.8.4.15`
- `adaptive_security_appliance_software >= 9.9, < 9.9.2.61`
- `adaptive_security_appliance_software >= 9.10, < 9.10.1.32`
- `adaptive_security_appliance_software >= 9.12, < 9.12.3`
- `adaptive_security_appliance_software >= 9.13, < 9.13.1.4`
- `adaptive_security_appliance_software >= 9.14, < 9.14.2.7`
- `adaptive_security_appliance_software >= 9.15, < 9.15.1.4`
- `secure_firewall_management_center < 6.2.3.16`
- `secure_firewall_management_center >= 6.3.0, < 6.3.0.6`
- `secure_firewall_management_center >= 6.4.0, < 6.4.0.7`
- `secure_firewall_management_center >= 6.5.0, < 6.5.0.2`
- `secure_firewall_threat_defense`

## Remediation

Upgrade past the affected range:

- `adaptive_security_appliance 9.6.4.36`
- `adaptive_security_appliance_software 9.15.1.4`
- `secure_firewall_management_center 6.5.0.2`