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Windows 11 24h2Operating system · Microsoft

CVE-2026-50322

HIGH · 7.0 CVSS v3.1 Published 2026-07-14
Fix available
A fix is available. Upgrade to 10.0.26100.8875 / 10.0.26100.33158 or later.
See remediation →
72/100
Remediation priority · Elevated
Zero-click 5 weeks old

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 · unedited
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.

In the news

Third-party coverage
Trending covered by 1 outlet this week · latest 1mo ago

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 confidence

A race condition vulnerability in Windows Runtime allows an authorized local attacker to elevate privileges by exploiting improper synchronization when accessing shared resources. The vulnerability stems from concurrent execution that does not properly serialize access to sensitive operations or data structures.

MitigationApply Microsoft security updates for Windows Runtime components. For custom applications, review code paths interacting with Windows Runtime APIs and ensure proper use of synchronization primitives (e.g., critical sections, mutexes, atomic operations) when accessing shared state.

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
Windows 11 24h2Operating system
Affected:< 10.0.26100.8875
Windows 11 25h2Operating system
Affected:< 10.0.26200.8875
Windows 11 26h1Operating system
Affected:< 10.0.28000.2269< 10.0.28000.2525
Windows Server 2025Operating system
Affected:< 10.0.26100.33158

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Check Windows build version
    Run 'winver' or 'systeminfo | findstr /B /C:"OS Version"' to display the installed Windows build number
    Affected if Build number falls below the affected threshold for your Windows version (24h2: <26100.8875, 25h2: <26200.8875, 26h1: <28000.2269 or <28000.2525, Server 2025: <26100.33158)
  2. Identify exact Windows version
    Run 'reg query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v CurrentBuild' and '/v CurrentBuildNumber' to retrieve precise build identifiers
    Affected if The retrieved build number is lower than the specified threshold for your Windows 11 or Server 2025 release
  3. Confirm Windows 11 feature update
    Run 'reg query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v DisplayVersion' to identify if running 24h2, 25h2, or 26h1
    Affected if DisplayVersion shows 24h2, 25h2, or 26h1 with a build number below the respective threshold

You are affected if your Windows 11 24h2/25h2/26h1 or Windows Server 2025 installation has a build number lower than the specified thresholds, as the race condition exists in the Windows Runtime component present by default on these systems.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to 10.0.26100.8875 / 10.0.26100.33158 / 10.0.26200.8875 or later
Fixed in 10.0.26100.887510.0.26100.3315810.0.26200.8875
Interim mitigation

Apply Microsoft security updates for Windows Runtime components. For custom applications, review code paths interacting with Windows Runtime APIs and ensure proper use of synchronization primitives (e.g., critical sections, mutexes, atomic operations) when accessing shared state.

Recommended fix High confidence

Install the latest Windows security updates from Windows Update (monthly patch Tuesday releases or later)

  1. Open Windows Settings on the affected system
  2. Navigate to Windows Update (Settings > Windows Update)
  3. Click 'Check for updates' to download and install the latest security updates
  4. Ensure the system restarts if prompted to complete the installation
  5. Verify the installed version matches or exceeds the fixed version for your Windows edition: Windows 11 24h2 should be 10.0.26100.8875 or later; Windows 11 25h2 should be 10.0.26200.8875 or later; Windows 11 26h1 should be 10.0.28000.2525 or later; Windows Server 2025 should be 10.0.26100.33158 or later
Caveat Standard Windows update with no expected breaking changes; as a local privilege escalation fix, this update should be prioritized

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Windows 11 24h2 Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,980
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-50322 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data