CVE-2022-0342: Critical severity zyxel usg 40 firmware vulnerability

Published Mar 28, 2022
·
Updated

An authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions V1.20 through V1.33 Patch 4, which could allow an attacker to bypass the web authentication and obtain administrative access of the device.

Affected Software

48 affected components
Zyxel Usg40 Firmware>=4.20<4.71
Zyxel USG40
Zyxel Usg40w Firmware>=4.20<4.71
Zyxel USG40W
Zyxel Usg60 Firmware>=4.20<4.71
Zyxel USG60
Zyxel Usg60w Firmware>=4.20<4.71
Zyxel USG60W
Zyxel Zywall 110 Firmware>=4.20<4.71
Zyxel ZyWALL 110
Zyxel Zywall 310 Firmware>=4.20<4.71
Zyxel ZyWALL 310
Zyxel Zywall 1100 Firmware>=4.20<4.71
Zyxel ZyWALL 1100
Zyxel Usg Flex 100 Firmware>=4.50<=5.20
Zyxel Usg Flex 100
Zyxel USG FLEX 200 firmware>=4.50<=5.20
Zyxel USG FLEX 200
Zyxel USG FLEX 500 firmware>=4.50<=5.20
Zyxel USG FLEX 500
Zyxel Usg Flex 100w Firmware>=4.50<=5.20
Zyxel Usg Flex 100w
Zyxel USG FLEX 700 firmware>=4.50<=5.20
Zyxel USG FLEX 700
Zyxel Atp100 Firmware>=4.32<=5.20
Zyxel Atp100
Zyxel Atp100w Firmware>=4.32<=5.20
Zyxel Atp100w
Zyxel Atp200 Firmware>=4.32<=5.20
Zyxel ATP200
Zyxel Atp500 Firmware>=4.32<=5.20
Zyxel ATP500
Zyxel Atp700 Firmware>=4.32<=5.20
Zyxel Atp700
Zyxel Atp800 Firmware>=4.32<=5.20
Zyxel ATP800
Zyxel Vpn50 Firmware>=4.30<5.21
Zyxel Vpn50
Zyxel Vpn100 Firmware>=4.30<5.21
Zyxel Vpn100
Zyxel Vpn300 Firmware>=4.30<5.21
Zyxel Vpn300
Zyxel Vpn1000 Firmware>=4.30<5.21
Zyxel Vpn1000
Zyxel Nsg300 Firmware>=1.20<1.33
Zyxel Nsg300 Firmware=1.33
Zyxel Nsg300 Firmware=1.33-p4
Zyxel Nsg300

Event History

Mar 28, 2022
CVE Published
via MITRE·12:05 PM
Data Sourced
via MITRE·12:05 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is CVE-2022-0342?

CVE-2022-0342 is an authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions 1.20 through 1.33.

2

What is the severity of CVE-2022-0342?

The severity of CVE-2022-0342 is critical, with a CVSS score of 9.8.

3

Which software versions are affected by CVE-2022-0342?

CVE-2022-0342 affects Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions 1.20 through 1.33.

4

How can I fix CVE-2022-0342?

To fix CVE-2022-0342, it is recommended to update to the latest firmware version provided by Zyxel.

5

Where can I find more information about CVE-2022-0342?

You can find more information about CVE-2022-0342 in the Zyxel security advisory for authentication bypass vulnerability of firewalls.

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