Microsoft Internet Explorer 6 and 7 on Windows XP and Vista does not prevent script from simulating user interaction with the AutoComplete feature, which allows remote attackers to obtain sensitive form information via a crafted web site, aka "AutoComplete Information Disclosure Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6889
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-071