CVE-2022-0910: Medium severity zyxel vpn100 vulnerability

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Published 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.

Affected Software

64 affected components

Zyxel Vpn100 Firmware>=4.32<=5.21

Zyxel Vpn100

Zyxel Vpn1000 Firmware>=4.32<=5.21

Zyxel Vpn1000

Zyxel Vpn300 Firmware>=4.32<=5.21

Zyxel Vpn300

Zyxel Vpn50 Firmware>=4.32<=5.21

Zyxel Vpn50

Zyxel Atp100 Firmware>=4.32<=5.21

Zyxel Atp100

Zyxel Atp100w Firmware>=4.32<=5.21

Zyxel Atp100w

Zyxel Atp200 Firmware>=4.32<=5.21

Zyxel ATP200

Zyxel Atp500 Firmware>=4.32<=5.21

Zyxel ATP500

Zyxel Atp700 Firmware>=4.32<=5.21

Zyxel Atp700

Zyxel Atp800 Firmware>=4.32<=5.21

Zyxel ATP800

Zyxel Usg 110 Firmware>=4.32<=4.71

Zyxel Usg 110

Zyxel Usg 1100 Firmware>=4.32<=4.71

Zyxel Usg 1100

Zyxel Usg 1900 Firmware>=4.32<=4.71

Zyxel Usg 1900

Zyxel Usg 20w Firmware>=4.32<=4.71

Zyxel Usg 20w

Zyxel Usg 20w-vpn Firmware>=4.32<=4.71

Zyxel Usg 20w-vpn

Zyxel Usg 2200-vpn Firmware>=4.32<=4.71

Zyxel Usg 2200-vpn

Zyxel Usg 310 Firmware>=4.32<=4.71

Zyxel Usg 310

Zyxel Usg 40 Firmware>=4.32<=4.71

Zyxel Usg 40

Zyxel Usg 40w Firmware>=4.32<=4.71

Zyxel Usg 40w

Zyxel Usg 60 Firmware>=4.32<=4.71

Zyxel Usg 60

Zyxel Usg 60w Firmware>=4.32<=4.71

Zyxel Usg 60w

Zyxel Usg Flex 100 Firmware>=4.50<=5.21

Zyxel Usg Flex 100

Zyxel Usg Flex 100w Firmware>=4.50<=5.21

Zyxel Usg Flex 100w

Zyxel USG FLEX 200 firmware>=4.50<=5.21

Zyxel USG FLEX 200

Zyxel USG FLEX 500 firmware>=4.50<=5.21

Zyxel USG FLEX 500

Zyxel USG FLEX 700 firmware>=4.50<=5.21

Zyxel USG FLEX 700

Zyxel Usg200 Firmware>=4.32<=4.71

Zyxel Usg200

Zyxel Usg20 Firmware>=4.32<=4.71

Zyxel Usg20

Zyxel Usg210 Firmware>=4.32<=4.71

Zyxel USG210

Zyxel Usg2200 Firmware>=4.32<=4.71

Zyxel Usg2200

Zyxel Usg300 Firmware>=4.32<=4.71

Zyxel Usg300

Zyxel Usg310 Firmware>=4.32<=4.71

Zyxel USG310

Event History

May 24, 2022

CVE Published

via MITRE·02:20 AM

Data Sourced

via MITRE·02:20 AM

DescriptionSeverityWeakness

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?