Microsoft Internet Explorer 7 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, leading to memory corruption, aka "HTML Rendering Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8532
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-018
http://www.vupen.com/english/advisories/2010/0744
http://www.us-cert.gov/cas/techalerts/TA10-089A.html
http://www.us-cert.gov/cas/techalerts/TA10-068A.html