Microsoft Internet Explorer 6 SP1 and SP2, 7, and 8 allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, leading to memory corruption, aka "Uninitialized Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7324
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-035
http://www.us-cert.gov/cas/techalerts/TA10-159B.html