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CVE-2026-50385 Microsoft CVE debrief

CVE-2026-50385 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 8.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible. The vulnerability exists in Windows Runtime and allows an authorized attacker to elevate privileges locally due to improper synchronization in a shared resource, leading to a race condition. 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.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 8.8
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. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

The vulnerability exists in Windows Runtime and allows an authorized attacker to elevate privileges locally due to improper synchronization in a shared resource, leading to a race condition. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that all Windows 11 and Windows Server 2025 systems are updated with the latest security patches
  • Monitor systems for suspicious activity
  • Implement additional security measures such as multi-factor authentication and least privilege access
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:40.090Z and was last modified on 2026-07-20T17:45:18.107Z. The NVD entry is currently Analyzed. The vulnerability exists in Windows Runtime, and Microsoft has released a patch for it. However, the specific details about the vulnerability, such as its scope and potential impact, are limited. Defenders should verify the affected systems and apply the patch as soon as possible.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50385 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50385

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

  • CVE-2026-50385 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50385

    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.