An issue in the component tpi_systool_handle(0) (/goform/SysToolRestoreSet) of Tenda W6-S v1.0.0.4(510) allows unauthenticated attackers to arbitrarily reboot the device.
https://github.com/z1r00/IOT_Vul/blob/main/Tenda/W6-S/SysToolRestoreSet/readme.md