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CVE-2026-50374 Microsoft CVE debrief

CVE-2026-50374 is a use-after-free vulnerability in the Windows Cloud Files Mini Filter Driver. An authorized attacker could exploit this vulnerability with a physical attack to elevate privileges. Microsoft has released a patch for this vulnerability. The vulnerability has a CVSS score of 6.3 and a severity of MEDIUM. System administrators and users of Windows 10, Windows 11, and Windows Server systems should be aware of this vulnerability and apply the necessary patches. The vulnerability exists because the Windows Cloud Files Mini Filter Driver does not properly handle memory, allowing an attacker to exploit this weakness. To mitigate this vulnerability, it is essential to apply the patch released by Microsoft and ensure that only authorized users have physical access to systems.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-20
Advisory published
2026-07-14
Advisory updated
2026-07-20

Who should care

System administrators and users of Windows 10, Windows 11, and Windows Server systems should be aware of this vulnerability and apply the necessary patches. Additionally, security teams and vulnerability management teams should review the vulnerability and assess the potential impact on their systems.

Technical summary

The vulnerability exists in the Windows Cloud Files Mini Filter Driver, which is used to manage cloud files on Windows systems. An attacker who has physical access to a system and authorization to execute code could exploit this vulnerability to elevate privileges. The vulnerability has been assigned a CVSS score of 6.3 and a severity of MEDIUM. To exploit this vulnerability, an attacker would need to have physical access to the system and authorization to execute code. The vulnerability can be mitigated by applying the patch released by Microsoft and ensuring that only authorized users have physical access to systems.

Defensive priority

Medium

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that only authorized users have physical access to systems
  • Monitor system logs for suspicious activity
  • Implement additional security measures to prevent physical attacks
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:38.507Z and last modified on 2026-07-20T14:41:16.050Z. The NVD entry is currently Analyzed. This vulnerability affects Windows 10, Windows 11, and Windows Server systems. Microsoft has released a patch for this vulnerability. However, the specific details of the vulnerability, such as the potential impact and affected configurations, should be verified through official sources like CVE.org and NVD for accurate and up-to-date information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50374 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50374

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

  • CVE-2026-50374 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50374

    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.