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CVE-2025-21386

Target: Office - Excel

Microsoft CVSS 7.8 Updated March 10, 2026
Threat Level HIGH

Executive Risk Summary

"A remote code execution vulnerability exists in Microsoft Excel, which could allow an attacker to execute arbitrary code on a victim's system. This vulnerability can be exploited by convincing a user to open a specially crafted Excel file."

Operational Audit Arsenal

Target Type Application
Target Asset Microsoft Excel
Standard Path Client Workstations and Servers
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Microsoft Excel (Application)
$Target = "Microsoft Excel"
$SearchPaths = @("$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

Low to Moderate

Internal Work Notes

Apply the latest security updates from Microsoft to mitigate the vulnerability, and consider implementing additional security measures such as input validation and secure file handling practices.

Intelligence Sources

Scope of Impact

Office (Version 2019) Office Long Term Servicing Channel (Version 2024) Excel (Version 2016) 365 Apps Office Online Server Office Long Term Servicing Channel (Version 2021)

Original NVD Description

"Microsoft Excel Remote Code Execution Vulnerability"

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