CVE-2025-4348 D-Link DIR-600L formSetWanL2TP buffer overflow

High 8.7 Published 6 May 2025 Updated 6 May 2025

Remote attackers can exploit a buffer overflow in the L2TP configuration interface of unsupported D-Link DIR-600L routers to execute arbitrary code.

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-2025-4348?

CVE-2025-4348 is a high-severity memory corruption vulnerability in D-Link DIR-600L, published on 6 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was found in D-Link DIR-600L up to 2.07B01. It has been rated as critical. Affected by this issue is the function formSetWanL2TP. The manipulation of the argument host leads to buffer overflow. The attack may be launched remotely. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2025-4348?

It affects 1 product.

Products include Dlink Dir-600l Firmware.

How do I fix CVE-2025-4348?

No fix has been published for CVE-2025-4348 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-2025-4348 being exploited?

There is no known exploitation of CVE-2025-4348 in the wild and no public exploit code.

Sources

Also known as GHSA-gfj4-xfm6-jh2c.