medium
6.5
CWE
287
Advisory Published
Updated

CVE-2022-0910

First published: Tue May 24 2022(Updated: )

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.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel VPN100>=4.32<=5.21
Zyxel Zywall VPN100
Zyxel VPN1000 Firmware>=4.32<=5.21
Zyxel VPN1000 Firmware
Zyxel Zywall VPN 300 Firmware>=4.32<=5.21
Zyxel Zywall VPN300
Zyxel Zywall VPN 50 Firmware>=4.32<=5.21
Zyxel VPN50 Firmware
Zyxel ZyWall ATP100 Firmware>=4.32<=5.21
Zyxel ATP100 Firmware
Zyxel ATP100W Firmware>=4.32<=5.21
Zyxel ATP100W Firmware
Zyxel ATP200 firmware>=4.32<=5.21
Zyxel Zywall ATP200
Zyxel ATP500 Firmware>=4.32<=5.21
Zyxel ATP500 Firmware
Zyxel Zywall ATP700>=4.32<=5.21
Zyxel ATP700 Firmware
Zyxel Zywall ATP800 Firmware>=4.32<=5.21
Zyxel Zywall ATP800 Firmware
Zyxel USG 110>=4.32<=4.71
Zyxel USG 110 Firmware
Zyxel USG1100 firmware>=4.32<=4.71
Zyxel USG 1100 firmware
Zyxel USG1900 Firmware>=4.32<=4.71
Zyxel USG1900
Zyxel USG 20W>=4.32<=4.71
Zyxel USG20
Zyxel USG 20W-VPN Firmware>=4.32<=4.71
Zyxel USG20
Zyxel USG2200-VPN Firmware>=4.32<=4.71
Zyxel USG2200-VPN Firmware
Zyxel ZyWALL USG 310 firmware>=4.32<=4.71
Zyxel ZyWALL USG 310
Zyxel USG40W Firmware>=4.32<=4.71
Zyxel USG40W
Zyxel USG40W Firmware>=4.32<=4.71
Zyxel USG40W
Zyxel USG60 Firmware>=4.32<=4.71
Zyxel USG60 Firmware
Zyxel USG60W Firmware>=4.32<=4.71
Zyxel USG 60w firmware
Zyxel USG Flex 100 firmware>=4.50<=5.21
Zyxel USG Flex 100 firmware
Zyxel USG FLEX 100w firmware>=4.50<=5.21
Zyxel USG FLEX 100w firmware
Zyxel USG FLEX firmware>=4.50<=5.21
Zyxel USG FLEX 200 firmware
Zyxel USG FLEX firmware>=4.50<=5.21
Zyxel USG FLEX 500 firmware
Zyxel USG FLEX firmware>=4.50<=5.21
Zyxel USG FLEX 700 firmware
Zyxel USG200 Firmware>=4.32<=4.71
Zyxel USG200 Firmware
Zyxel USG20-VPN Firmware>=4.32<=4.71
Zyxel USG20 Firmware
Zyxel USG210 Firmware>=4.32<=4.71
Zyxel USG210 Firmware
Zyxel USG2200-VPN Firmware>=4.32<=4.71
Zyxel USG2200-VPN
Zyxel USG300 Firmware>=4.32<=4.71
Zyxel USG300 Firmware
Zyxel USG 310 firmware>=4.32<=4.71
Zyxel USG 310

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2022-0910?

    CVE-2022-0910 has been rated as a high severity vulnerability due to its potential to downgrade authentication methods.

  • How do I fix CVE-2022-0910?

    To remediate CVE-2022-0910, upgrade your Zyxel USG/ZyWALL, USG FLEX, ATP, or VPN series firmware to a version that is not affected.

  • Which devices are affected by CVE-2022-0910?

    CVE-2022-0910 affects various Zyxel devices including the USG/ZyWALL series, USG FLEX series, ATP series, and VPN series running specific firmware versions.

  • What does the CVE-2022-0910 vulnerability exploit?

    CVE-2022-0910 exploits a flaw that allows attackers to downgrade two-factor authentication to one-factor authentication.

  • Is my Zyxel device vulnerable to CVE-2022-0910?

    If your Zyxel device is running any of the vulnerable firmware versions listed for CVE-2022-0910, it is indeed at risk and should be updated.

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