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CVE-2025-21331

Windows - Installer

Microsoft CVSS 7.3 Updated March 10, 2026

Executive Risk Summary

"A vulnerability in the Windows Installer component could allow an attacker to elevate their privileges, potentially leading to unauthorized access to sensitive data and system resources. This vulnerability is considered critical and should be patched as soon as possible to prevent potential attacks."

Operational Audit Arsenal

Target Type Executable
Target Asset msiexec.exe
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: msiexec.exe (Executable)
$Targets = 'msiexec.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

Installation services may be affected

Internal Work Notes

Elevation of Privilege vulnerability in Windows Installer, patching required to prevent unauthorized access

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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.