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CVE-2025-21331

Target: Windows - Installer

Microsoft CVSS 7.3 Updated March 10, 2026
Threat Level HIGH

Executive Risk Summary

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

Operational Audit Arsenal

Target Type System Component
Target Asset Windows Installer
Standard Path Windows Operating System
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Windows Installer (System Component)
$Target = "Windows Installer"
$SearchPaths = @("$env:windir\System32", "$env:ProgramFiles", "${env:ProgramFiles(x86)}")

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

Patch Impact Forecast

Reboot Required Required
Service Disruption

Low to Moderate

Internal Work Notes

Recommend applying the latest security updates from Microsoft to mitigate the Windows Installer Elevation of Privilege Vulnerability (CVE-2025-21331).

Intelligence Sources

Scope of Impact

Windows 10 1507 Windows 11 23H2 Windows Server 2012 Windows Server 2022 23H2 Windows Server 2016 Windows Server 2019 Windows Server 2012 (Version r2) Windows Server 2008 Windows 10 21H2 Windows 10 22H2 Windows Server 2008 (Version r2) Windows Server 2022 Windows 11 22H2 Windows 10 1607 Windows 10 1809

Original NVD Description

"Windows Installer Elevation of Privilege Vulnerability"

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