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CVE-2026-50322 Microsoft CVE debrief

CVE-2026-50322 is a high-severity vulnerability in Windows Runtime that allows an authorized attacker to elevate privileges locally due to a race condition. The vulnerability has a CVSS score of 7 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible. This vulnerability affects Windows 11 24H2, 25H2, and 26H1, as well as Windows Server 2025. The vulnerability is caused by a race condition in Windows Runtime, which allows an authorized attacker to elevate privileges locally. Users should verify the authenticity of the patch and apply it as soon as possible. Additionally, defenders should review system logs for suspicious activity and implement additional security measures such as multi-factor authentication and least privilege access. It is essential for system administrators and users of Windows 11 and Windows Server 2025 to be aware of this vulnerability and take necessary precautions to mitigate its effects.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

System administrators and users of Windows 11 and Windows Server 2025 should be aware of this vulnerability and take necessary precautions to mitigate its effects.

Technical summary

The vulnerability is caused by a race condition in Windows Runtime, which allows an authorized attacker to elevate privileges locally. The vulnerability affects Windows 11 24H2, 25H2, and 26H1, as well as Windows Server 2025. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that Windows 11 and Windows Server 2025 systems are up-to-date with the latest security patches
  • Monitor systems for suspicious activity
  • Implement additional security measures, such as multi-factor authentication and least privilege access

Evidence notes

The vulnerability is documented in the CVE record and the NVD detail page. Microsoft has released a patch for this vulnerability, which is available on their update guide website. The patch addresses the race condition in Windows Runtime, allowing an authorized attacker to elevate privileges locally. Users should verify the authenticity of the patch and apply it as soon as possible. Additionally, defenders should review system logs for suspicious activity and implement additional security measures such as multi-factor authentication and least privilege access.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50322 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50322

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50322 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50322

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.