TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary. The overflow allows an authenticated user to execute arbitrary code by POSTing to apply.cgi via the action kick_ban_wifi_mac_allow with a sufficiently long qcawifi.wifi0_vap0.maclist key.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14074
Reference (s):
- https://github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/TRENDnet-kick_ban_wifi.pdf
- https://github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/kick_ban_wifi_mac_allow_overflow.pdf