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CVE-2026-50667: Windows Common Log File System Driver Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-50667
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows NTFS allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows NTFSPrivilege escalation
What
An authorized attacker can elevate privileges locally due to a race condition in concurrent execution.
Who is affected
Authorized users of Windows NTFS.
Urgency
Remediation is urgent due to the high severity of the vulnerability.
Action
Apply the latest updates for Windows NTFS.

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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-2026-50667

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-2026-50667coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows Common Log

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.

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