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CVE-2025-21389

Target: Windows - Universal Plug and Play (UPnP) Device Host

Microsoft CVSS 7.5 Updated March 10, 2026
Threat Level HIGH

Executive Risk Summary

"A vulnerability in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker to deny service over a network, potentially causing disruptions to network services. This vulnerability can be exploited by an attacker to consume system resources, leading to a denial-of-service condition."

Operational Audit Arsenal

Target Type Service
Target Asset UPnP Device Host
Standard Path Network
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: UPnP Device Host (Service)
$Target = "UPnP Device Host"
$SearchPaths = @("$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

Medium

Internal Work Notes

Apply the latest security updates from Microsoft to mitigate the vulnerability, and monitor system resources for signs of unauthorized consumption.

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 11 24H2 Windows Server 2025 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

"Uncontrolled resource consumption in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker to deny service over a network."

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