A component in Microsoft Outlook Express 6 allows remote attackers to bypass domain restrictions and obtain sensitive information via redirections with the mhtml: URI handler, as originally reported for Internet Explorer 6 and 7, aka "URL Redirect Cross Domain Information Disclosure Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1605
https://exchange.xforce.ibmcloud.com/vulnerabilities/26281
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-034
http://www.vupen.com/english/advisories/2007/2154
http://www.vupen.com/english/advisories/2006/1558
http://www.us-cert.gov/cas/techalerts/TA07-163A.html
http://www.securityfocus.com/bid/17717
http://www.securityfocus.com/archive/1/471947/100/0/threaded
http://www.securityfocus.com/archive/1/449917/100/0/threaded
http://www.securityfocus.com/archive/1/449883/100/200/threaded