CVE-2020-10823: DrayTek VIGOR2960 Firmware

Critical severity, CVSS 9.8. EPSS: 4.4% chance of exploitation in the next 30 days.

A stack-based buffer overflow in /cgi-bin/activate.cgi through var parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request (issue 1 of 3).

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 2020-03-26. Last modified 2026-06-17.