DFSR.exe in Windows Meeting Space in Microsoft Windows Vista remains available for remote connections on TCP port 5722 for 2 minutes after Windows Meeting Space is closed, which allows remote attackers to have an unknown impact by connecting to this port during the time window.
http://www.symantec.com/avcenter/reference/Vista_Network_Attack_Surface_RTM.pdf
http://www.securityfocus.com/archive/1/464617/100/0/threaded
http://www.securityfocus.com/archive/1/462793/100/0/threaded