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CVE-2025-21402

Microsoft Office - OneNote

Microsoft CVSS 7.8 Updated March 10, 2026

Executive Risk Summary

"A remote code execution vulnerability exists in Microsoft Office OneNote, allowing an attacker to execute arbitrary code on the target system. Successful exploitation of this vulnerability could result in the attacker gaining control of the affected system."

Operational Audit Arsenal

Target Type Executable
Target Asset onenote.exe
Standard Path %programfiles%Microsoft OfficeRootOffice16onenote.exe
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: onenote.exe (Executable)
$Targets = 'onenote.exe'
$SearchPaths = @("$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

Microsoft Office services may be affected

Internal Work Notes

Apply latest Microsoft Office security updates to mitigate remote code execution vulnerability in OneNote

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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.