CVE-2015-2489
Microsoft Internet Explorer 11 allows remote attackers to gain privileges via a crafted web site, as demonstrated by a transition from Low Integrity to Medium Integrity, aka "Elevation of Privilege Vulnerability."
Date published : 2015-09-08
http://www.securityfocus.com/bid/76585
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-094