CVE-2026-5980 D-Link DIR-605L POST Request formSetMACFilter buffer overflow

High 8.7 Published 9 Apr 2026 Updated 10 Apr 2026

Remote attackers can trigger a buffer overflow in the MAC filter handler of unsupported D-Link routers, potentially executing code or causing denial of service.

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-2026-5980?

CVE-2026-5980 is a high-severity memory corruption vulnerability in Dlink Dir-605l Firmware, published on 9 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A flaw has been found in D-Link DIR-605L 2.13B01. Affected by this issue is the function formSetMACFilter of the file /goform/formSetMACFilter of the component POST Request Handler. This manipulation of the argument curTime causes buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2026-5980?

It affects 1 product.

Products include Dlink Dir-605l Firmware.

How do I fix CVE-2026-5980?

No fix has been published for CVE-2026-5980 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-2026-5980 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5980 exists.

All Dlink Dir-605l Firmware vulnerabilities

Sources

Also known as GHSA-vp9w-9m49-6hgc.