Stack-based buffer overflow in VBScript in Microsoft Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP2, when Internet Explorer is used, might allow user-assisted remote attackers to execute arbitrary code via a long string in the fourth argument (aka helpfile argument) to the MsgBox function, leading to code execution when the F1 key is pressed, a different vulnerability than CVE-2010-0483.
https://exchange.xforce.ibmcloud.com/vulnerabilities/56560
http://www.theregister.co.uk/2010/03/01/ie_code_execution_bug/
http://www.microsoft.com/technet/security/advisory/981169.mspx
http://blogs.technet.com/msrc/archive/2010/03/01/security-advisory-981169-released.aspx