CVE-2022-0342 Auth bypass in ATP series firmware

Critical 9.8 Published 28 Mar 2022 Updated 2 Aug 2024

Attackers can bypass web authentication in Zyxel firewall firmware to gain administrative access to the device.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-0342?

CVE-2022-0342 is a critical authentication bypass vulnerability in Zyxel ATP series firmware, published on 28 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions V1.20 through V1.33 Patch 4, which could allow an attacker to bypass the web authentication and obtain administrative access of the device.

Weakness: CWE-287

Which versions are affected by CVE-2022-0342?

It affects 23 products.

Products include Zyxel Atp100 Firmware, Zyxel Atp100w Firmware, Zyxel Atp200 Firmware, Zyxel Atp500 Firmware, Zyxel Atp700 Firmware, Zyxel Atp800 Firmware and 17 more.

How do I fix CVE-2022-0342?

No fix has been published for CVE-2022-0342 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-2022-0342 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-0342 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-5g3j-g6gx-xfcg.