CVE-2026-1544 D-Link DIR-823X set_mode sub_41E2A0 os command injection

Medium 5.3 Published 28 Jan 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary OS commands on unsupported D-Link DIR-823X routers via the set_mode interface.

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-2026-1544?

CVE-2026-1544 is a medium-severity command injection vulnerability in D-Link DIR-823X, published on 28 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A security flaw has been discovered in D-Link DIR-823X 250416. Impacted is the function sub_41E2A0 of the file /goform/set_mode. Performing a manipulation of the argument lan_gateway results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-1544?

It affects 1 product.

Products include Dlink Dir-823x Firmware.

How do I fix CVE-2026-1544?

No fix has been published for CVE-2026-1544 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-2026-1544 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1544 exists.

Sources

Also known as GHSA-4gx6-36jg-p3wm.