Multiple unspecified vulnerabilities in the Microsoft Internet Explorer 8 Developer Tools ActiveX control in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allow remote attackers to execute arbitrary code via unknown vectors that "corrupt the system state," aka "Microsoft Internet Explorer 8 Developer Tools Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7492
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12534
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-027
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-034