CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-50378: Windows Key Guard Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-50378
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Key Guard allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Key GuardPrivilege escalation
What
Race condition vulnerability allows an authorized attacker to elevate privileges locally.
Who is affected
Users of Windows Key Guard with the affected version.
Urgency
Remediation is urgent due to the high severity and potential for exploitation.
Action
Install the latest security patches for Windows Key Guard.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Windows Key Guard

Get an email when a new Windows Key Guard advisory drops — max one per day, one-click unsubscribe.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50378

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-50378coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows Key Guard

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center