CVE-2021-20123: Draytek VigorConnect Path Traversal Vulnerability

High severity, CVSS 7.5. Actively exploited: in CISA KEV since 2024-09-03. EPSS: 90.2% chance of exploitation in the next 30 days.

A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

Affected products

• DrayTek VigorConnect: version 1.6.0 only

Published 2021-10-13. Last modified 2026-06-17.