CVE-2022-41140 Memory corruption in Multiple Routers

High 8.8 Published 26 Jan 2023 Updated 1 Apr 2025

Network-adjacent attackers can execute arbitrary code as root on D-Link routers via a stack buffer overflow in the lighttpd service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-41140?

CVE-2022-41140 is a high-severity memory corruption vulnerability in D-Link Multiple Routers, published on 26 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple D-Link routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lighttpd service, which listens on TCP port 80 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13796.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2022-41140?

It affects 3 products.

Products include Dlink Dir-867 Firmware, Dlink Dir-878 Firmware, Dlink Dir-882-Us Firmware.

How do I fix CVE-2022-41140?

No fix has been published for CVE-2022-41140 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-2022-41140 being exploited?

There is no known exploitation of CVE-2022-41140 in the wild and no public exploit code.

Sources

Also known as GHSA-qcrm-3jcv-ppvq.