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CVE-2025-21309

Windows - Remote Desktop Services

Microsoft CVSS 8.1 Updated March 10, 2026

Executive Risk Summary

"A remote code execution vulnerability exists in Windows Remote Desktop Services, allowing an attacker to execute arbitrary code on the target system. This vulnerability can be exploited by sending a specially crafted request to the Remote Desktop Service, potentially leading to a full system compromise."

Operational Audit Arsenal

Target Type Service
Target Asset termservice
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: termservice (Service)
$Targets = 'termservice'
$SearchPaths = @("$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

Remote Desktop Services

Internal Work Notes

Apply security update for CVE-2025-21309 to prevent remote code execution vulnerability in Windows Remote Desktop Services

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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.