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CVE-2026-20858

Windows - Management Services

Microsoft CVSS 7.8 Updated March 15, 2026

Executive Risk Summary

"A use-after-free vulnerability in Windows Management Services allows an authorized attacker to elevate privileges locally, potentially leading to unauthorized access to sensitive data and system compromise. This vulnerability can be exploited by an attacker with local access to the system, and successful exploitation could result in a significant security breach."

Operational Audit Arsenal

Target Type System Library
Target Asset svchost.exe
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: svchost.exe (System Library)
$Targets = 'svchost.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-2026-20858: Windows Management Services vulnerability allowing local privilege escalation; patching required to prevent potential security breaches.

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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.