CVE-2026-26791 Command injection in n/a

Critical 9.8 Published 12 Mar 2026 Updated 14 Mar 2026

Attackers can execute arbitrary commands on GL-iNet routers via a crafted input in the echo server function.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-26791?

CVE-2026-26791 is a critical command injection vulnerability in n/a, published on 12 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

GL-iNet GL-AR300M16 v4.3.11 was discovered to contain a command injection vulnerability via the string port parameter in the enable_echo_server function. This vulnerability allows attackers to execute arbitrary commands via a crafted input.

Weakness: CWE-77

Which versions are affected by CVE-2026-26791?

It affects 1 product.

Products include Gl-Inet Ar300m16 Firmware.

How do I fix CVE-2026-26791?

No fix has been published for CVE-2026-26791 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-2026-26791 being exploited?

There is no known exploitation of CVE-2026-26791 in the wild and no public exploit code.

Sources

Also known as GHSA-g25x-8qh5-4hf4.