In Flexense Sync Breeze Enterprise v10.1.16, the Control Protocol suffers from a denial of service vulnerability. The attack vector is a crafted SERVER_GET_INFO packet sent to control port 9121.
https://www.exploit-db.com/exploits/43453/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-7115
http://packetstormsecurity.com/files/145760/Sync-Breeze-Enterprise-10.1.16-Denial-Of-Service.html