An issue was discovered on RLE Protocol Converter FDS-PC / FDS-PC-DP 2.1 devices. Persistent XSS exists in the web server. Remote attackers can inject malicious JavaScript code using the device's BACnet implementation. This is similar to a Cross Protocol Injection with SNMP.
http://misteralfa-hack.blogspot.com/2018/02/bacnet-entrando-en-materia.html