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CVE-2026-50668: Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability

mediumCVSS 6.8CVE-2026-50668
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to elevate privileges with a physical attack.

CSIRTS triage

vendor: Microsoftproduct: Windows NTFSPrivilege escalation
What
An unauthorized attacker can elevate privileges with a physical attack due to a heap-based buffer overflow.
Who is affected
Users with physical access to systems using Windows NTFS.
Urgency
Remediation is medium urgency due to the potential for physical exploitation.
Action
Update Windows NTFS to the latest version.

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

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 6.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50668

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-2026-50668coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows Resilient File

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