The Microsoft Device Guard on Microsoft Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows a security feature bypass by…

published 2017-10-13 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-3423

cvss: 6.7; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.6%; EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits: 1; Exploit-DB

The Microsoft Device Guard on Microsoft Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows a security feature bypass by the way it handles Windows PowerShell sessions, aka "Microsoft Windows Security Feature Bypass".

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11823 advisory

Timeline

2017-10-13 Published
2017-10-17 First public exploit (EDB-42997)

Exploit prediction

2.56% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-42997 Microsoft Windows 10 - WLDP/MSHTML CLSID UMCI Bypass dos, 2017-10-17

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.7	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

Microsoft Corporation Device Guard

Classification

Weakness

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2017-11823
patch, vendor-advisory
exploit-db.com /exploits/42997/
exploit, third-party-advisory, vdb-entry
securitytracker.com /id/1039526
vdb-entry, third-party-advisory
securityfocus.com /bid/101102
vdb-entry, third-party-advisory

Sources

CVE List CVE-2017-11823
NVD CVE-2017-11823

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary