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CVE-2026-20953

Microsoft Office - Core

Microsoft CVSS 8.4 Updated March 15, 2026

Executive Risk Summary

"A use-after-free vulnerability in Microsoft Office allows an unauthorized attacker to execute code locally, potentially leading to a complete system compromise. Successful exploitation requires the attacker to trick a user into opening a malicious Office file."

Operational Audit Arsenal

Target Type DLL
Target Asset msodll40.dll
Standard Path %ProgramFiles%\Microsoft Office\Root\Office16
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: msodll40.dll (DLL)
$Targets = 'msodll40.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 Microsoft Office security update to mitigate use-after-free vulnerability (CVE-2026-20953)

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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.