CVE-2022-27643 Memory corruption in R6700v3

High 8.8 Published 29 Mar 2023 Updated 18 Feb 2025

Network-adjacent attackers can execute arbitrary code as root on NETGEAR R6700v3 routers via a buffer overflow in SOAP request handling.

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-2022-27643?

CVE-2022-27643 is a high-severity memory corruption vulnerability in Netgear D6220 Firmware, published on 29 Mar 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 NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of SOAP requests. When parsing the SOAPAction header, the process does not properly validate the length of user-supplied data prior to copying it to a buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15692.

Weakness: CWE-120

Which versions are affected by CVE-2022-27643?

It affects 27 products.

Products include Netgear D6220 Firmware, Netgear D6400 Firmware, Netgear D7000v2 Firmware, Netgear Dc112a Firmware, Netgear Ex3700 Firmware, Netgear Ex3800 Firmware and 21 more.

How do I fix CVE-2022-27643?

No fix has been published for CVE-2022-27643 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-2022-27643 being exploited?

There is no known exploitation of CVE-2022-27643 in the wild and no public exploit code.

All Netgear D6220 Firmware vulnerabilities

Sources

Also known as GHSA-h8wj-xxvx-cv2r.