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CVE-2023-21554

Windows - Microsoft Message Queuing (MSMQ)

Microsoft CVSS 9.8 Updated March 18, 2026

Executive Risk Summary

"A remote code execution vulnerability exists in Microsoft Message Queuing (MSMQ) that could allow an attacker to execute arbitrary code on the affected system. This vulnerability can be exploited by sending a specially crafted message to the MSMQ service."

Operational Audit Arsenal

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

Moderate

Internal Work Notes

Apply latest Windows security updates to mitigate remote code execution vulnerability in Microsoft Message Queuing (MSMQ)

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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.