CVE-2026-5981 D-Link DIR-605L POST Request formAdvFirewall buffer overflow

High 8.7 Published 9 Apr 2026 Updated 13 Apr 2026

Remote attackers can trigger a buffer overflow in the firewall handler of unsupported D-Link DIR-605L 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-2026-5981?

CVE-2026-5981 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 vulnerability has been found in D-Link DIR-605L 2.13B01. This affects the function formAdvFirewall of the file /goform/formAdvFirewall of the component POST Request Handler. Such manipulation of the argument curTime leads to buffer overflow. The attack may 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-120, CWE-119

Which versions are affected by CVE-2026-5981?

It affects 1 product.

Products include Dlink Dir-605l Firmware.

How do I fix CVE-2026-5981?

No fix has been published for CVE-2026-5981 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-2026-5981 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5981 exists.

All Dlink Dir-605l Firmware vulnerabilities

Sources

Also known as GHSA-5hqg-6fcp-7pfp.