CVE-2025-1609 LB-LINK AC1900 Router set_cmd websGetVar os command injection

Medium 5.3 Published 24 Feb 2025 Updated 24 Feb 2025

Remote attackers can execute arbitrary OS commands via the set_cmd interface, requiring immediate attention from router administrators.

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

What is CVE-2025-1609?

CVE-2025-1609 is a medium-severity command injection vulnerability in LB-LINK AC1900 Router, published on 24 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been found in LB-LINK AC1900 Router 1.0.2 and classified as critical. Affected by this vulnerability is the function websGetVar of the file /goform/set_cmd. The manipulation of the argument cmd leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2025-1609?

It affects 1 product.

Products include Lb-Link Ac1900 Firmware.

How do I fix CVE-2025-1609?

No fix has been published for CVE-2025-1609 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-2025-1609 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-1609 exists.

Sources

Also known as GHSA-fw6f-4rpm-3gpw.