The server in Flexense SysGauge 3.6.18 operating on port 9221 can be exploited remotely with the attacker gaining system-level access because of a Buffer Overflow.
https://www.exploit-db.com/exploits/43588/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-17138
http://packetstormsecurity.com/files/145900/SysGauge-Server-3.6.18-Buffer-Overflow.html