CVE-2021-46387: Zyxel Zywall 2 Plus Internet Security Appliance Firmware

Medium severity, CVSS 6.1. EPSS: 21% chance of exploitation in the next 30 days.

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.

Affected products

• Zyxel Zywall 2 Plus Internet Security Appliance Firmware: affected versions not specified

Published 2022-03-01. Last modified 2026-06-17.