CVE-2021-34540: Advantech Webaccess

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.

Affected products

• Advantech Webaccess: version 8.4.2 only; version 8.4.4 only

Published 2021-06-11. Last modified 2026-06-17.