DrayTek VigorConnect: 2 actively exploited vulnerabilities

CVE-2021-20123: 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. CVE-2021-20124: Draytek VigorConnect contains a path traversal vulnerability in the file download functionality of the WebServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges. Added to the CISA KEV catalog on 2024-09-03. CVE-2021-20123, CVE-2021-20124 were assigned before 2024; the KEV listing came in 2024.

Why this severity: CVSS 7.5 (v3.1, CISA-ADP), actively exploited (CISA KEV)

Started

Sep 3, 2024

Closed

Sep 3, 2024

CVEs

CVE-2021-20123CVE-2021-20124

• #DrayTek
• #Router
• CISA KEV

Notes & caveats

Derived from the CISA KEV JSON feed (catalogVersion 2026.10.21); CVSS from the CVE record (cveawg.mitre.org). startedAt is the CVE publication date when it fell in 2024 before the KEV listing, else the KEV dateAdded; exploitation may have begun earlier. closedAt is the KEV listing date (a fix or mitigation was available then unless noted).