WRPCServer.exe in WinSoftMagic WinRemotePC (WRPC) Lite 2008 and Full 2008 allows remote attackers to cause a denial of service (CPU consumption) via a crafted packet to TCP port 4321.
https://www.exploit-db.com/exploits/6077
https://exchange.xforce.ibmcloud.com/vulnerabilities/43784
http://www.vupen.com/english/advisories/2008/2112/references
http://www.securityfocus.com/bid/30236