Microsoft Internet Explorer 5.01 and 6 does not properly handle uninitialized COM objects, which allows remote attackers to cause a denial of service (memory corruption) and possibly execute arbitrary code, as demonstrated by the Nth function in the DirectAnimation.DATuple ActiveX control, aka "COM Object Instantiation Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A719
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-042
http://www.vupen.com/english/advisories/2006/3212
http://www.us-cert.gov/cas/techalerts/TA06-220A.html
http://www.tippingpoint.com/security/advisories/TSRT-06-09.html
http://www.securityfocus.com/bid/19340
http://www.securityfocus.com/archive/1/442728/100/0/threaded
http://www.kb.cert.org/vuls/id/959049