Hyper-V in Microsoft Windows 8.1, Windows Server 2012 R2, and Windows 10 improperly processes ACL settings, which allows local users to byp…

published 2015-09-09 11y ago modified 2026-06-17 4mo ago also EUVD-2015-2627

cvss: 1.9; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

Hyper-V in Microsoft Windows 8.1, Windows Server 2012 R2, and Windows 10 improperly processes ACL settings, which allows local users to bypass intended network-traffic restrictions via a crafted application, aka "Hyper-V Security Feature Bypass Vulnerability."

Patch / fix

links 1

docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-105 advisory

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Exploit prediction

1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	1.9	AV:L/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-284 Improper Access Control

References

docs.microsoft.com /en-us/security-updates/securitybulletins/2015/ms15-105
vendor-advisory, patch
securitytracker.com /id/1033496
vdb-entry, third-party-advisory

Sources

CVE List CVE-2015-2534
NVD CVE-2015-2534

Fencer Intel 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.