CVE-2025-34238: Advantech Webaccess/vpn

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Advantech WebAccess/VPN versions prior to 1.1.5 contain an absolute path traversal via AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction() that allows an authenticated network administrator to cause the application to read and return the contents of arbitrary files the web user (www-data) can access.

Affected products

• Advantech Webaccess/vpn: before 1.1.5 (fixed in 1.1.5)

Published 2025-11-06. Last modified 2026-10-07.