CVE-2021-46387
6.1 · MEDIUMOverview
CVE-2021-46387 is a medium-severity vulnerability affecting zyxel zywall_2_plus_internet_security_appliance_firmware. It was published on March 1, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS). Insecure URI handling leads to bypass security restriction to achieve Cross Site Scripting, which allows an attacker able to execute arbitrary JavaScript codes to perform multiple attacks such as clipboard hijacking and session hijacking.
Remediation
Check the references section for vendor advisories and patches from zyxel. Update zywall_2_plus_internet_security_appliance_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 |
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References
Frequently Asked Questions
What is CVE-2021-46387?
CVE-2021-46387 is a medium-severity vulnerability affecting zyxel zywall_2_plus_internet_security_appliance_firmware. It was published on March 1, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).
How severe is CVE-2021-46387?
This vulnerability has a CVSS 3.1 base score of 6.1, 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-2021-46387?
Check the references section for vendor advisories and patches from zyxel. Update zywall_2_plus_internet_security_appliance_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-2021-46387?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-46387 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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