The User Mode Code Integrity (UMCI) implementation in Device Guard in Microsoft Internet Explorer 11 allows remote attackers to bypass a code-signing protection mechanism via unspecified vectors, aka "Internet Explorer Security Feature Bypass."
http://www.securityfocus.com/bid/90003
http://www.securitytracker.com/id/1035820
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-051
Source: MITRE
Published: 2016-05-11
Updated: 2018-10-12
Type: CWE-284
Base Score: 9.3
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 8.6
Severity: HIGH
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH