Tenda AC15 WriteFacMac formWriteFacMac os command injection

A vulnerability was found in Tenda AC15 15.03.05.18/15.03.20_multi. It has been classified as critical. This affects the function formWriteFacMac of the file /goform/WriteFacMac. The manipulation of the argument mac leads to os command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-257667. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.