What’s Vulnerable › Vulnerabilities

CVE-2025-34238: Advantech WebAccess/VPN < 1.1.5 Path Traversal via AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction()

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-11-06 · updated 2026-10-07
• Weakness: CWE-22

Description

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

How to fix

Upgrade to a fixed version: Advantech Webaccess/Vpn 1.1.5. Check the vendor advisory for mitigations.

References

• https://icr.advantech.com/download/software
• https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf
• https://www.vulncheck.com/advisories/advantech-webaccess-vpn-path-traversal-via-ajaxstandalonevpnclientscontroller

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