critical
9.8
CWE
287
Advisory Published
Updated

CVE-2022-0342

First published: Mon 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.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel USG 40 firmware>=4.20<4.71
Zyxel USG 40
Zyxel USG 40w firmware>=4.20<4.71
Zyxel USG40W
Zyxel USG60 Firmware>=4.20<4.71
Zyxel USG 60
Zyxel USG60W Firmware>=4.20<4.71
Zyxel USG 60w
Zyxel Zywall 110>=4.20<4.71
Zyxel Zywall 110 firmware
Zyxel ZyWALL USG 310 firmware>=4.20<4.71
Zyxel Zywall 310 firmware
Zyxel Zywall 1100 Firmware>=4.20<4.71
Zyxel Zywall 1100 Firmware
Zyxel USG Flex 100 firmware>=4.50<=5.20
Zyxel USG FLEX 100
Zyxel USG FLEX 200>=4.50<=5.20
Zyxel USG FLEX 200 firmware
Zyxel USG FLEX 500>=4.50<=5.20
Zyxel USG FLEX 500 firmware
Zyxel USG FLEX 100w firmware>=4.50<=5.20
Zyxel USG FLEX 100w firmware
Zyxel USG FLEX 700 firmware>=4.50<=5.20
Zyxel USG FLEX 700 firmware
Zyxel ATP100 Firmware>=4.32<=5.20
Zyxel ATP100 Firmware
Zyxel ATP100W Firmware>=4.32<=5.20
Zyxel ATP100W Firmware
Zyxel ATP200 firmware>=4.32<=5.20
Zyxel ATP200 firmware
Zyxel ATP500 Firmware>=4.32<=5.20
Zyxel ATP500 Firmware
Zyxel ATP700 Firmware>=4.32<=5.20
Zyxel ATP700 Firmware
Zyxel ATP800>=4.32<=5.20
Zyxel ATP800 Firmware
Zyxel Zywall VPN 50 Firmware>=4.30<5.21
Zyxel VPN50 Firmware
Zyxel VPN100>=4.30<5.21
Zyxel VPN100 Firmware
Zyxel Zywall VPN 300 Firmware>=4.30<5.21
Zyxel VPN300
Zyxel VPN1000 Firmware>=4.30<5.21
Zyxel VPN1000 Firmware
Zyxel NSG300 Firmware>=1.20<1.33
Zyxel NSG300 Firmware=1.33
Zyxel NSG300 Firmware=1.33-p4
Zyxel NSG300 Firmware

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Reference Links

Frequently Asked Questions

  • 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.

  • What is the severity of CVE-2022-0342?

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

  • 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.

  • 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.

  • 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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