Home Microsoft CVE-2025-21183
Back to Microsoft

CVE-2025-21183

Windows - Resilient File System (ReFS)

Microsoft CVSS 7.4 Updated March 10, 2026

Executive Risk Summary

"A vulnerability in the Windows Resilient File System (ReFS) Deduplication Service could allow an attacker to elevate their privileges. This vulnerability can be exploited by an attacker to gain elevated access to sensitive data and systems."

Operational Audit Arsenal

Target Type Service
Target Asset ReFS Deduplication Service
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: ReFS Deduplication Service (Service)
$Targets = 'ReFS Deduplication Service'
$SearchPaths = @("$env:windir\System32", "$env:ProgramFiles", "${env:ProgramFiles(x86)}")

Get-ChildItem -Path $SearchPaths -Include $Targets -Recurse -ErrorAction SilentlyContinue | 
Select-Object FullName, @{Name="Version";Expression={$_.VersionInfo.ProductVersion}}

Patch Impact Forecast

Reboot Required Likely

File system services may be affected

Internal Work Notes

Elevation of Privilege vulnerability in Windows ReFS Deduplication Service, requiring patching to prevent potential security breaches

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Related Microsoft Threats

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.