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CVE-2026-20946

Microsoft Office - Excel

Microsoft CVSS 7.8 Updated March 15, 2026

Executive Risk Summary

"A critical vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally via an out-of-bounds read. This vulnerability poses a significant risk to data integrity and system security, as it can be exploited to gain unauthorized access and control."

Operational Audit Arsenal

Target Type Dynamic Link Library
Target Asset excel.exe
Standard Path %ProgramFiles%\Microsoft Office\Root\Office16
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: excel.exe (Dynamic Link Library)
$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

Moderate

Internal Work Notes

CVE-2026-20946: Out-of-bounds read in Microsoft Office Excel. Apply latest security patch from Microsoft to prevent code execution and potential data breaches.

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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.