CVE-2026-20016
Description
A vulnerability in the Cisco FXOS Software CLI feature for Cisco Secure Firewall ASA Software and Secure FTD Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system with root-level privileges. To exploit this vulnerability, the attacker must have valid administrative credentials on an affected device. This vulnerability is due to insufficient input validation of user-supplied command arguments. An attacker could exploit this vulnerability by submitting crafted input for specific CLI commands. A successful exploit could allow the attacker to execute commands on the underlying operating system with root-level privileges.
How to fix
- cisco secure_firewall_threat_defense7.0.9, 7.2.11, 7.4.3, 7.6.4, 7.7.11 or later
- cisco adaptive_security_appliance_software9.16.4.85, 9.18.4.66, 9.20.4, 9.22.2.4, 9.23.1.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco secure_firewall_threat_defense | 6.4.0 ≤ v < 7.0.9, 7.1.0 ≤ v < 7.2.11, 7.3.0 ≤ v < 7.4.3, 7.6.0 ≤ v < 7.6.4, 7.7.0 ≤ v < 7.7.11 | 7.0.9, 7.2.11, 7.4.3, 7.6.4, 7.7.11 |
| cisco adaptive_security_appliance_software | 9.12.1 ≤ v < 9.16.4.85, 9.17.1 ≤ v < 9.18.4.66, 9.19.1 ≤ v < 9.20.4, 9.22.1.1 ≤ v < 9.22.2.4, 9.23.1 ≤ v < 9.23.1.7 | 9.16.4.85, 9.18.4.66, 9.20.4, 9.22.2.4, 9.23.1.7 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.