Internet Explorer in Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows an attacker to bypass Device Guard User Mode Code Integrity (UMCI) policies due to Internet Explorer failing to validate UMCI policies, aka "Internet Explorer Security Feature Bypass Vulnerability".
https://posts.specterops.io/umci-vs-internet-explorer-exploring-cve-2017-8625-3946536c6442
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8625
https://oddvar.moe/2017/08/13/bypassing-device-guard-umci-using-chm-cve-2017-8625/