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CVE-2025-21201

Target: Windows - Telephony Server

Microsoft CVSS 8.8 Updated March 10, 2026
Threat Level HIGH

Executive Risk Summary

"A remote code execution vulnerability exists in the Windows Telephony Server, which could allow an attacker to execute arbitrary code on the affected system. This vulnerability is considered critical and should be patched as soon as possible to prevent potential attacks."

Operational Audit Arsenal

Target Type Server
Target Asset Windows Telephony Server
Standard Path Network
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Windows Telephony Server (Server)
$Target = "Windows Telephony Server"
$SearchPaths = @("$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 Windows Telephony Server Remote Code Execution Vulnerability (CVE-2025-21201).

Intelligence Sources

Scope of Impact

Windows Server 2022 23H2 Windows 10 1809 Windows Server 2008 (Version r2) Windows 11 24H2 Windows 10 22H2 Windows Server 2012 (Version r2) Windows Server 2016 Windows Server 2008 Windows Server 2012 Windows Server 2025 Windows 11 22H2 Windows 10 21H2 Windows 10 1607 Windows Server 2019 Windows 11 23H2 Windows 10 1507 Windows Server 2022

Original NVD Description

"Windows Telephony Server Remote Code Execution Vulnerability"

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