CVE-2020-15415: DrayTek Multiple Vigor Routers OS Command Injection Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2024-09-30. EPSS: 84.5% chance of exploitation in the next 30 days.

On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1, cgi-bin/mainfunction.cgi/cvmcfgupload allows remote command execution via shell metacharacters in a filename when the text/x-python-script content type is used, a different issue than CVE-2020-14472.

Affected products

• DrayTek VIGOR2960 Firmware: before 1.5.1 (fixed in 1.5.1)
• DrayTek VIGOR300B Firmware: before 1.5.1 (fixed in 1.5.1)
• DrayTek VIGOR3900 Firmware: before 1.5.1 (fixed in 1.5.1)

Published 2020-06-30. Last modified 2026-06-17.