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CVE-2022-0342

CRITICALCVSS 9.8/10EPSS 84.84%

Last modified

CVE-2022-0342 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 84.84% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
84.84%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ZyxelUsg40 Firmware>= 4.20, < 4.71
ZyxelUsg40w Firmware>= 4.20, < 4.71
ZyxelUsg60 Firmware>= 4.20, < 4.71
ZyxelUsg60w Firmware>= 4.20, < 4.71
ZyxelZywall 110 Firmware>= 4.20, < 4.71
ZyxelZywall 310 Firmware>= 4.20, < 4.71
ZyxelZywall 1100 Firmware>= 4.20, < 4.71
ZyxelUsg Flex 100 Firmware>= 4.50, <= 5.20
ZyxelUsg Flex 200 Firmware>= 4.50, <= 5.20
ZyxelUsg Flex 500 Firmware>= 4.50, <= 5.20
ZyxelUsg Flex 100w Firmware>= 4.50, <= 5.20
ZyxelUsg Flex 700 Firmware>= 4.50, <= 5.20
ZyxelAtp100 Firmware>= 4.32, <= 5.20
ZyxelAtp100w Firmware>= 4.32, <= 5.20
ZyxelAtp200 Firmware>= 4.32, <= 5.20
ZyxelAtp500 Firmware>= 4.32, <= 5.20
ZyxelAtp700 Firmware>= 4.32, <= 5.20
ZyxelAtp800 Firmware>= 4.32, <= 5.20
ZyxelVpn50 Firmware>= 4.30, < 5.21
ZyxelVpn100 Firmware>= 4.30, < 5.21
ZyxelVpn300 Firmware>= 4.30, < 5.21
ZyxelVpn1000 Firmware>= 4.30, < 5.21
ZyxelNsg300 Firmware>= 1.20, < 1.33
ZyxelNsg300 Firmware1.33

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-0342?
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.
How severe is CVE-2022-0342?
CVE-2022-0342 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 84.84% probability of exploitation in the next 30 days.
How do I fix CVE-2022-0342?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST