CVE-2022-0910
MEDIUMZyxel USG/ZyWALL/USG FLEX/ATP/VPN Firmware 4.32-4.71/5.21 - Authenticated 2FA Downgrade via CGI
Title source: llmDescription
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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml
Scores
CVSS v3
6.5
EPSS
0.0015
EPSS Percentile
35.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-287
Status
published
Products (32)
zyxel/atp100_firmware
4.32 - 5.21
zyxel/atp100w_firmware
4.32 - 5.21
zyxel/atp200_firmware
4.32 - 5.21
zyxel/atp500_firmware
4.32 - 5.21
zyxel/atp700_firmware
4.32 - 5.21
zyxel/atp800_firmware
4.32 - 5.21
zyxel/usg200_firmware
4.32 - 4.71
zyxel/usg20_firmware
4.32 - 4.71
zyxel/usg210_firmware
4.32 - 4.71
zyxel/usg2200_firmware
4.32 - 4.71
... and 22 more
Published
May 24, 2022
Tracked Since
Feb 18, 2026