Microsoft Internet Explorer 7 through 11 does not prevent use of wildcard EV SSL certificates, which might allow remote attackers to spoof a trust level by leveraging improper issuance of a wildcard certificate by a recognized Certification Authority, aka "Extended Validation (EV) Certificate Security Feature Bypass Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-037
http://www.securitytracker.com/id/1030532