CVE-2025-1103 D-Link DIR-823X HTTP POST Request set_wifi_blacklists null pointer dereference

High 7.1 Published 7 Feb 2025 Updated 7 Feb 2025

Remote attackers can cause a denial of service on D-Link DIR-823X routers by triggering a null pointer dereference in the WiFi blacklist handler.

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-2025-1103?

CVE-2025-1103 is a high-severity vulnerability in D-Link DIR-823X, published on 7 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability, which was classified as problematic, was found in D-Link DIR-823X 240126/240802. This affects the function set_wifi_blacklists of the file /goform/set_wifi_blacklists of the component HTTP POST Request Handler. The manipulation of the argument macList leads to null pointer dereference. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-476, CWE-404

Which versions are affected by CVE-2025-1103?

It affects 1 product.

Products include Dlink Dir-823x Firmware.

How do I fix CVE-2025-1103?

No fix has been published for CVE-2025-1103 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-1103 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-1103 exists.

Sources

Also known as GHSA-244c-33wx-j66j.