Microsoft Internet Explorer 5.01, 6, and 7 allows remote attackers to execute arbitrary code by causing Internet Explorer to access an uninitialized or deleted object, related to prototype variables and table cells, aka "Uninitialized Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1978
https://exchange.xforce.ibmcloud.com/vulnerabilities/34626
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-033