CVE-2022-0342
9.8 · CRITICALOverview
CVE-2022-0342 is a critical-severity vulnerability affecting zyxel usg40_firmware. It was published on March 28, 2022 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from zyxel. Update usg40_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| zyxel | usg40_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | usg40w_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | usg60_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | usg60w_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | zywall_110_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | zywall_310_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | zywall_1100_firmware | >= 4.20, < 4.71 | Affected |
| zyxel | usg_flex_100_firmware | 4.50 | Affected |
| zyxel | usg_flex_200_firmware | 4.50 | Affected |
| zyxel | usg_flex_500_firmware | 4.50 | Affected |
Frequently Asked Questions
What is CVE-2022-0342?
CVE-2022-0342 is a critical-severity vulnerability affecting zyxel usg40_firmware. It was published on March 28, 2022 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2022-0342?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2022-0342?
Check the references section for vendor advisories and patches from zyxel. Update usg40_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2022-0342?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-0342 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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