CVE-2026-20063 Cisco Secure FTD Software Authenticated Command Injection Vulnerability
An authenticated local attacker with admin credentials can execute arbitrary OS commands as root via crafted CLI input in Cisco Secure FTD.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20063?
CVE-2026-20063 is a medium-severity command injection vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the CLI of Cisco Secure FTD Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system as root. 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 a specific CLI command. A successful exploit could allow the attacker to execute commands on the underlying operating system as root.
Weakness: CWE-88
Which versions are affected by CVE-2026-20063?
How do I fix CVE-2026-20063?
No fix has been published for CVE-2026-20063 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-20063 being exploited?
There is no known exploitation of CVE-2026-20063 in the wild and no public exploit code.
Sources
Also known as GHSA-x599-6m8q-75qp.