Race condition in Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors involving access to an object, aka "Window Open Race Condition Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12787
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-057