A vulnerability classified as critical has been found in Tenda AC7 15.03.06.44. Affected is the function formWriteFacMac of the file /goform/WriteFacMac. The manipulation of the argument mac leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-257940. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.