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CVE-2026-20859

Windows - Kernel-Mode Drivers

Microsoft CVSS 7.8 Updated March 15, 2026

Executive Risk Summary

"A use-after-free vulnerability in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally, potentially leading to unauthorized access to sensitive data and system compromise. This vulnerability requires immediate attention to prevent potential security breaches."

Operational Audit Arsenal

Target Type System Driver
Target Asset ntoskrnl.exe
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: ntoskrnl.exe (System Driver)
$Targets = 'ntoskrnl.exe'
$SearchPaths = @("$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

Moderate

Internal Work Notes

CVE-2026-20859: Windows Kernel-Mode Drivers vulnerability - requires patching to prevent local privilege escalation

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Intelligence Sources

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