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CVE-2025-21351

Target: Windows - Active Directory Domain Services

Microsoft CVSS 7.5 Updated March 10, 2026
Threat Level HIGH

Executive Risk Summary

"A denial of service vulnerability exists in Windows Active Directory Domain Services API, which could allow an attacker to cause a denial of service. This vulnerability can be exploited by sending a specially crafted request to the affected API."

Operational Audit Arsenal

Target Type API
Target Asset Active Directory Domain Services API
Standard Path Windows Domain Controllers
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Active Directory Domain Services API (API)
$Target = "Active Directory Domain Services API"
$SearchPaths = @("$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

Apply the latest security updates from Microsoft to mitigate the vulnerability, and monitor system logs for potential exploitation attempts.

Intelligence Sources

Scope of Impact

Windows Server 2022 23H2 Windows 10 1809 Windows 11 24H2 Windows 10 22H2 Windows Server 2016 Windows 11 22H2 Windows 10 21H2 Windows 10 1607 Windows Server 2019 Windows 11 23H2 Windows Server 2025 Windows Server 2022

Original NVD Description

"Windows Active Directory Domain Services API Denial of Service Vulnerability"

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