CVE-2021-20123
DR
DrayTek VigorConnect
Draytek VigorConnect Path Traversal Vulnerability
What it is
Draytek VigorConnect contains a path traversal vulnerability in the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor notices and references
- www.draytek.com/about/security-advisory/vigorconnect-software-security-vulnerability-(cve-
- nvd.nist.gov/vuln/detail/CVE-2021-20123
Description and required action as published by CISA. Full record at NVD.
Other DrayTek entries on the list
- Vigor Routers DrayTek Vigor Routers OS Command Injection Vulnerability CVE-2024-12987 · May 15, 2025
- Multiple Vigor Routers DrayTek Multiple Vigor Routers OS Command Injection Vulnerability CVE-2020-15415 · Sep 30, 2024
- VigorConnect Draytek VigorConnect Path Traversal Vulnerability CVE-2021-20124 · Sep 3, 2024
- Multiple Vigor Routers Multiple DrayTek Vigor Routers Web Management Page Vulnerability CVE-2020-8515 · Nov 3, 2021