Tenda AC15 SetSpeedWan formSetSpeedWan stack-based overflow

A vulnerability was found in Tenda AC15 15.03.05.18/15.03.20_multi. It has been rated as critical. Affected by this issue is the function formSetSpeedWan of the file /goform/SetSpeedWan. The manipulation of the argument speed_dir leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-257660. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.