CVE-2025-5969 D-Link DIR-632 HTTP POST Request biurl_grou FUN_00425fd8 stack-based overflow

High 8.7 Published 10 Jun 2025 Updated 10 Jun 2025

Remote attackers can execute arbitrary code via a stack-based buffer overflow in the HTTP POST handler of unsupported D-Link DIR-632 routers.

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-2025-5969?

CVE-2025-5969 is a high-severity memory corruption vulnerability in D-Link DIR-632, published on 10 Jun 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 D-Link DIR-632 FW103B08 and classified as critical. Affected by this vulnerability is the function FUN_00425fd8 of the file /biurl_grou of the component HTTP POST Request Handler. The manipulation leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2025-5969?

It affects 1 product.

Products include Dlink Dir-632 Firmware.

How do I fix CVE-2025-5969?

No fix has been published for CVE-2025-5969 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-5969 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5969 exists.

Sources

Also known as GHSA-69hm-8j4h-xgr9.