CVE-2019-15992: Cisco Adaptive Security Appliance

High severity, CVSS 7.2. EPSS: 4.1% chance of exploitation in the next 30 days.

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 products

• Cisco Adaptive Security Appliance: before 9.6.4.36 (fixed in 9.6.4.36)
• Cisco Adaptive Security Appliance Software: from 9.7, before 9.8.4.15 (fixed in 9.8.4.15); from 9.9, before 9.9.2.61 (fixed in 9.9.2.61); from 9.10, before 9.10.1.32 (fixed in 9.10.1.32); from 9.12, before 9.12.3 (fixed in 9.12.3); from 9.13, before 9.13.1.4 (fixed in 9.13.1.4); from 9.14, before 9.14.2.7 (fixed in 9.14.2.7); …
• Cisco Secure Firewall Management Center: before 6.2.3.16 (fixed in 6.2.3.16); from 6.3.0, before 6.3.0.6 (fixed in 6.3.0.6); from 6.4.0, before 6.4.0.7 (fixed in 6.4.0.7); from 6.5.0, before 6.5.0.2 (fixed in 6.5.0.2)
• Cisco Secure Firewall Threat Defense: affected versions not specified

Published 2020-09-23. Last modified 2026-08-11.