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CVE-2026-27926 Microsoft CVE debrief

A race condition vulnerability in the Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally. Multiple Windows versions are affected, including Windows 10, Windows 11, and Windows Server. Microsoft has released patches for this vulnerability. The vulnerability is a race condition in the Windows Cloud Files Mini Filter Driver, which is a critical component that handles file operations in the Windows operating system. An authorized attacker can exploit this vulnerability to gain elevated privileges locally, potentially leading to a compromise of the system. System administrators and security teams should assess exposure and apply patches to

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-14
Original CVE updated
2026-10-15
Advisory published
2026-04-14
Advisory updated
2026-10-15

Who should care

System administrators and security teams responsible for Windows systems should assess exposure and apply patches to prevent local privilege escalation attacks.

Why it matters

CVE-2026-27926 is a race condition vulnerability in the Windows Cloud Files Mini Filter Driver that allows an authorized attacker to elevate privileges locally. System administrators and security teams should assess exposure and apply patches immediately to prevent local privilege escalation attacks.

  • Apply patches to prevent local privilege escalation
  • Verify system logs for potential exploitation attempts
  • Assess exposure for affected Windows versions

Technical summary

The Windows Cloud Files Mini Filter Driver is vulnerable to a race condition, allowing an authorized attacker to elevate privileges locally. This issue affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server. Microsoft has released patches to address this vulnerability.

Defensive priority

Apply patches immediately for Windows Cloud Files Mini Filter Driver to prevent local privilege escalation attacks.

Recommended defensive actions

  • Apply patches for Windows Cloud Files Mini Filter Driver
  • Verify and apply patches for affected Windows versions
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE Program and NVD provide official records of this vulnerability. Microsoft has released a patch for this issue. The vulnerability is a race condition in the Windows Cloud Files Mini Filter Driver, which allows an authorized attacker to elevate privileges locally. The CVE record was published on 2026-04-14T16:57:15.177Z and has not been modified since then. The official CVE Program record and NVD vulnerability detail provide further information on this vulnerability. Additionally

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27926 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27926

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

  • CVE-2026-27926 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27926

    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.