Vulnerability · Published Mar 28, 2022 · Assigned by Zyxel
CVE-2022-0342
Critical 9.8
In plain English
A critical-severity improper authentication in ATP series firmware from Zyxel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 95.1% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | USG/ZyWALL series firmware | 4.20 through 4.70 |
| Zyxel | USG FLEX series firmware | 4.50 through 5.20 |
| Zyxel | ATP series firmware | 4.32 through 5.20 |
| Zyxel | VPN series firmware | 4.30 through 5.20 |
| Zyxel | NSG series firmware | 1.20 through 1.33 Patch 4 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H