CVE-2026-2961 D-Link DWR-M960 VPN Configuration Endpoint formVpnConfigSetup sub_4196C4 stack-based overflow

High 8.7 Published 23 Feb 2026 Updated 23 Feb 2026

Remote attackers can trigger a stack-based buffer overflow in the VPN configuration endpoint of D-Link DWR-M960 routers, potentially leading to arbitrary code execution.

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-2026-2961?

CVE-2026-2961 is a high-severity memory corruption vulnerability in D-Link DWR-M960, published on 23 Feb 2026. 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 DWR-M960 1.01.07. This affects the function sub_4196C4 of the file /boafrm/formVpnConfigSetup of the component VPN Configuration Endpoint. The manipulation of the argument submit-url leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2026-2961?

It affects 1 product.

Products include Dlink Dwr-M960 Firmware.

How do I fix CVE-2026-2961?

No fix has been published for CVE-2026-2961 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-2026-2961 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2961 exists.

Sources

Also known as GHSA-6m36-rgr7-cxwp.