CVE-2020-8515
DrayTek Vigor2960 1.3.1_Beta; Vigor3900 1.4.4_Beta; and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI.
Source: CVE-2020-8515