What’s Vulnerable › Vulnerabilities

CVE-2022-0910

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-24 · updated 2026-06-17
• Weakness: CWE-287

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

• Zyxel Atp100 Firmware: from 4.32 through 5.21
• Zyxel Atp100W Firmware: from 4.32 through 5.21
• Zyxel Atp200 Firmware: from 4.32 through 5.21
• Zyxel Atp500 Firmware: from 4.32 through 5.21
• Zyxel Atp700 Firmware: from 4.32 through 5.21
• Zyxel Atp800 Firmware: from 4.32 through 5.21
• Zyxel Usg200 Firmware: from 4.32 through 4.71
• Zyxel Usg20 Firmware: from 4.32 through 4.71
• Zyxel Usg210 Firmware: from 4.32 through 4.71
• Zyxel Usg2200 Firmware: from 4.32 through 4.71
• Zyxel Usg300 Firmware: from 4.32 through 4.71
• Zyxel Usg310 Firmware: from 4.32 through 4.71
• Zyxel Usg 1100 Firmware: from 4.32 through 4.71
• Zyxel Usg 110 Firmware: from 4.32 through 4.71
• Zyxel Usg 1900 Firmware: from 4.32 through 4.71
• Zyxel USG 20(W)-VPN firmware: from 4.32 through 4.71
• Zyxel Usg 20W Firmware: from 4.32 through 4.71
• Zyxel Usg 2200-Vpn Firmware: from 4.32 through 4.71
• Zyxel Usg 310 Firmware: from 4.32 through 4.71
• Zyxel Usg 40 Firmware: from 4.32 through 4.71
• Zyxel Usg 40W Firmware: from 4.32 through 4.71
• Zyxel Usg 60 Firmware: from 4.32 through 4.71
• Zyxel Usg 60W Firmware: from 4.32 through 4.71
• Zyxel firewall (ZLD): from 4.50 through 5.21
• Zyxel USG FLEX 100(W) firmware: from 4.50 through 5.21
• Zyxel USG FLEX 200 firmware: from 4.50 through 5.21
• Zyxel USG FLEX 500 firmware: from 4.50 through 5.21
• Zyxel USG FLEX 700 firmware: from 4.50 through 5.21
• Zyxel Vpn1000 Firmware: from 4.32 through 5.21
• Zyxel Vpn100 Firmware: from 4.32 through 5.21

References

• https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml
• https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml

Get alerted when CVE-2022-0910 or the next vulnerability affects your stack