CVE-2022-40603
4.7 · MEDIUMOverview
CVE-2022-40603 is a medium-severity vulnerability affecting zyxel atp800_firmware. It was published on December 6, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A cross-site scripting (XSS) vulnerability in the CGI program of Zyxel ZyWALL/USG series firmware versions 4.30 through 4.72, VPN series firmware versions 4.30 through 5.31, USG FLEX series firmware versions 4.50 through 5.31, and ATP series firmware versions 4.32 through 5.31, which could allow an attacker to trick a user into visiting a crafted URL with the XSS payload. Then, the attacker could gain access to some browser-based information if the malicious script is executed on the victim’s browser.
Remediation
Check the references section for vendor advisories and patches from zyxel. Update atp800_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 | atp800_firmware | 4.32 | Affected |
| zyxel | atp700_firmware | 4.32 | Affected |
| zyxel | atp500_firmware | 4.32 | Affected |
| zyxel | atp200_firmware | 4.32 | Affected |
| zyxel | atp100_firmware | 4.32 | Affected |
| zyxel | atp100w_firmware | 4.32 | Affected |
| zyxel | usg_flex_100w_firmware | 4.50 | Affected |
| zyxel | usg_flex_200_firmware | 4.50 | Affected |
| zyxel | usg_flex_500_firmware | 4.50 | Affected |
| zyxel | usg_flex_700_firmware | 4.50 | Affected |
Frequently Asked Questions
What is CVE-2022-40603?
CVE-2022-40603 is a medium-severity vulnerability affecting zyxel atp800_firmware. It was published on December 6, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
How severe is CVE-2022-40603?
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2022-40603?
Check the references section for vendor advisories and patches from zyxel. Update atp800_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-2022-40603?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-40603 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.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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