Microsoft Internet Explorer 5.01 through 6 allows remote attackers to execute arbitrary code via crafted layout combinations involving DIV tags and HTML CSS float properties that trigger memory corruption, aka "HTML Rendering Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A456
https://exchange.xforce.ibmcloud.com/vulnerabilities/29199
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-067
http://www.zerodayinitiative.com/advisories/ZDI-06-041.html
http://www.vupen.com/english/advisories/2006/4505
http://www.us-cert.gov/cas/techalerts/TA06-318A.html
http://www.securityfocus.com/bid/21020
http://www.securityfocus.com/archive/1/451590/100/100/threaded