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CVE-2025-21407

Windows - Telephony Service

Microsoft CVSS 8.8 Updated March 10, 2026

Executive Risk Summary

"A remote code execution vulnerability exists in the Windows Telephony Service, allowing attackers to execute arbitrary code on affected systems. Successful exploitation could lead to a complete system compromise, emphasizing the need for immediate patching."

Operational Audit Arsenal

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

Telephony services may be temporarily unavailable

Internal Work Notes

Apply security update for CVE-2025-21407 to prevent remote code execution via Windows Telephony Service

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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.