CVE-2025-14208 D-Link DIR-823X set_wan_settings sub_415028 command injection

Medium 5.3 Published 8 Dec 2025 Updated 8 Dec 2025

Remote attackers can execute arbitrary commands on D-Link DIR-823X routers via the ppp_username parameter in set_wan_settings.

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-2025-14208?

CVE-2025-14208 is a medium-severity command injection vulnerability in D-Link DIR-823X, published on 8 Dec 2025. 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 up to 20250416. This affects the function sub_415028 of the file /goform/set_wan_settings. The manipulation of the argument ppp_username results in command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2025-14208?

It affects 1 product.

Products include Dlink Dir-823x Firmware.

How do I fix CVE-2025-14208?

No fix has been published for CVE-2025-14208 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-2025-14208 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-14208 exists.

Sources

Also known as GHSA-rmmh-rfhx-7vmf.