The Terminal Services COM object (tsuserex.dll) allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by instantiating it as an ActiveX object in Internet Explorer 6.0 SP1 on Microsoft Windows 2003 EE SP1 CN.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28444
http://www.securityfocus.com/archive/1/443493/100/0/threaded