CVE-2022-27642 Auth bypass in R6700v3

Medium 6.3 Published 29 Mar 2023 Updated 18 Feb 2025

Network-adjacent attackers can bypass authentication on NETGEAR R6700v3 routers due to flawed string matching in the httpd 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-2022-27642?

CVE-2022-27642 is a medium-severity authentication bypass vulnerability in Netgear R6400 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 bypass authentication 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 httpd service. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-15854.

Weakness: CWE-863

Which versions are affected by CVE-2022-27642?

It affects 33 products.

Products include Netgear Cax80 Firmware, Netgear Lax20 Firmware, Netgear Mr60 Firmware, Netgear Mr80 Firmware, Netgear Ms60 Firmware, Netgear Ms80 Firmware and 27 more.

How do I fix CVE-2022-27642?

No fix has been published for CVE-2022-27642 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2022-27642 being exploited?

There is no known exploitation of CVE-2022-27642 in the wild and no public exploit code.

All Netgear R6400 Firmware vulnerabilities

Sources

Also known as GHSA-w94x-h737-f6h9.