CVE-2021-20125

9.8 criticalEPSS 3.9%

Critical (9.8) in draytek vigorconnect. EPSS 3.9% chance of exploitation in the next 30 days.

An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 3.9% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWEs: CWE-22, CWE-434
Published: 2021-10-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

draytek:vigorconnect

References

https://www.tenable.com/security/research/tra-2021-42
https://www.tenable.com/security/research/tra-2021-42

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