CVE-2021-34726 Cisco SD-WAN Software Command Injection Vulnerability

Medium 6.7 Published 23 Sep 2021 Updated 7 Nov 2024

Authenticated administrative users can inject arbitrary commands to execute code with root privileges on Cisco SD-WAN devices.

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-2021-34726?

CVE-2021-34726 is a medium-severity command injection vulnerability in Cisco SD-WAN Solution, published on 23 Sep 2021. 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 SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root-level privileges on the underlying operating system of an affected device. This vulnerability is due to insufficient input validation on certain CLI commands. An attacker could exploit this vulnerability by authenticating to an affected device and submitting crafted input to the CLI. The attacker must be authenticated as an administrative user to execute the affected commands. A successful exploit could allow the attacker to execute commands with root-level privileges.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2021-34726?

It affects 1 product.

Products include Cisco Sd-Wan.

How do I fix CVE-2021-34726?

No fix has been published for CVE-2021-34726 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-2021-34726 being exploited?

There is no known exploitation of CVE-2021-34726 in the wild and no public exploit code.

Sources

Also known as GHSA-9rmh-x4g9-gfqw.