Microsoft Internet Explorer 6 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability."
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-2817
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-051