Home Microsoft CVE-2025-26634
Back to Microsoft

CVE-2025-26634

Target: Windows - Core Messaging

Microsoft CVSS 7.5 Updated March 10, 2026
Threat Level HIGH

Executive Risk Summary

"A heap-based buffer overflow vulnerability in Windows Core Messaging allows an authorized attacker to elevate privileges over a network, potentially leading to unauthorized access and control. This vulnerability poses a significant risk to Windows systems, as it can be exploited remotely by an attacker with network access."

Operational Audit Arsenal

Target Type Service
Target Asset Windows Core Messaging
Standard Path Network
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Windows Core Messaging (Service)
$Target = "Windows Core Messaging"
$SearchPaths = @("$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

Moderate

Internal Work Notes

Apply the latest security updates from Microsoft to mitigate the vulnerability, and monitor system logs for suspicious activity.

Intelligence Sources

Scope of Impact

Windows Server 2022 23H2 Windows 11 24H2 Windows 10 22H2 Windows Server 2016 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

"Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network."

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