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CVE-2026-20963

Microsoft Office SharePoint

Microsoft CVSS 8.8 Updated March 15, 2026

Executive Risk Summary

"A vulnerability in Microsoft Office SharePoint allows an authorized attacker to execute code over a network by deserializing untrusted data, potentially leading to code execution and system compromise. This vulnerability poses a significant risk to data integrity and system security, as it can be exploited by attackers to gain unauthorized access and control over affected systems."

Operational Audit Arsenal

Target Type dll
Target Asset Microsoft.SharePoint.dll
Standard Path %ProgramFiles%\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Microsoft.SharePoint.dll (dll)
$Targets = 'Microsoft.SharePoint.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 security update for CVE-2026-20963 to Microsoft Office SharePoint to prevent code execution vulnerability. PowerShell audit script: Get-ChildItem -Path 'C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI' -Filter 'Microsoft.SharePoint.dll' | Select-Object -ExpandProperty VersionInfo

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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.