TOTOLINK A3700R cstecgi.cgi setWanCfg command injection

A vulnerability classified as critical has been found in TOTOLINK A3700R 9.1.2u.5822_B20200513. Affected is the function setWanCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument hostName leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-272574 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.