Vulnerability · Published May 24, 2022 · Assigned by Zyxel
CVE-2022-0910
Medium 6.5
In plain English
A medium-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 0.7% (higher than 55% of all known vulnerabilities).
Official description
A downgrade from two-factor authentication to one-factor authentication vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.32 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, and VPN series firmware versions 4.32 through 5.21, that could allow an authenticated attacker to bypass the second authentication phase to connect the IPsec VPN server even though the two-factor authentication (2FA) was enabled.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | USG/ZyWALL series firmware | 4.32 through 4.71 |
| Zyxel | USG FLEX series firmware | 4.50 through 5.21 |
| Zyxel | ATP series firmware | 4.32 through 5.21 |
| Zyxel | VPN series firmware | 4.32 through 5.21 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N