CVE-2026-50667
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedConcurrent execution using shared resource with improper synchronization ('race condition') in Windows NTFS allows an authorized attacker to elevate privileges locally.
In the news
Third-party coverage- Microsoft July 2026 Patch Tuesday fixes massive 570 flaws, 3 zero-days
- Microsoft CVE Summary - Bleeping Computer
Surfaced from public web coverage — external links open in a new tab.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA race condition vulnerability exists in Windows NTFS where concurrent file system operations fail to properly synchronize shared resources. An authorized local attacker can exploit this timing vulnerability to manipulate file system operations and escalate privileges to higher permission levels.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 10.0.14393.9339< 10.0.17763.9020< 10.0.19044.7548< 10.0.19045.7548< 10.0.26100.8875< 10.0.26200.8875< 10.0.28000.2525all versions= r2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Windows version and build numberRun 'winver' from the Start menu or execute 'systeminfo' in Command Prompt and locate the 'OS Version' and 'Build' fieldsAffected if The build number falls below the fixed version for your Windows release (e.g., below 10.0.14393.9339 for Windows 10 1607, below 10.0.17763.9020 for Windows 10 1809, etc.)
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Confirm Windows editionCheck if the system is running Windows Server 2012 or Windows Server 2012 R2 by opening 'System Information' (msinfo32) and looking at the 'OS Name' fieldAffected if The system is Windows Server 2012 or Windows Server 2012 R2 (all versions of these products are affected)
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Verify NTFS file system is in useOpen an elevated Command Prompt and run 'fsutil fsinfo volumeinfo C:' (or any local drive letter) and check the 'File System Name' fieldAffected if The file system is NTFS (this vulnerability affects NTFS specifically; other file systems like exFAT or FAT32 are not affected)
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Check for pending security updatesOpen Settings > Windows Update > Update history and look for recent security updates, or run 'wmic qfe list' in Command Prompt to see installed hotfixesAffected if No recent NTFS-related security updates are installed and the version/build is in the affected range
A system is affected if it runs any of the listed Windows versions or Windows Server 2012/2012 R2 with a build number lower than the fixed version, uses NTFS, and lacks the corresponding security update.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data10.0.14393.933910.0.17763.902010.0.19044.7548
Apply Microsoft security updates for Windows NTFS as they become available through standard patch management processes. Monitor Microsoft's security bulletins for the relevant CVE.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-50667 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-50667 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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