Unspecified vulnerability in Microsoft Internet Explorer 5.01 SP4, 6, 6 SP1, and 7 allows remote attackers to execute arbitrary code via a crafted data stream header that triggers memory corruption, aka "Data Stream Header Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6454
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-054