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CVE-2025-21387

Microsoft Office - Excel

Microsoft CVSS 7.8 Updated March 10, 2026

Executive Risk Summary

"A remote code execution vulnerability exists in Microsoft Excel, allowing an attacker to execute arbitrary code on a victim's 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 excel.exe
Standard Path %ProgramFiles%Microsoft OfficeRootOffice16
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: excel.exe (Executable)
$Targets = 'excel.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 Excel

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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.