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.