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CVE-2025-21200

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. This vulnerability poses a significant risk to system security and integrity, as it can be exploited without user interaction."

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 affected

Internal Work Notes

Apply security update to mitigate Windows Telephony Service RCE vulnerability (CVE-2025-21200)

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Intelligence Sources

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