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CVE-2026-21260

Microsoft Office Outlook

Microsoft CVSS 7.5 Updated March 15, 2026

Executive Risk Summary

"A vulnerability in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network, potentially exposing sensitive information. This vulnerability poses a risk to the confidentiality and integrity of sensitive data."

Operational Audit Arsenal

Target Type Executable
Target Asset outlook.exe
Standard Path %ProgramFiles%\Microsoft Office\Root\Office16
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: outlook.exe (Executable)
$Targets = 'outlook.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

Email services may be affected

Internal Work Notes

Investigate and apply patch for CVE-2026-21260 to prevent spoofing attacks in Microsoft Office Outlook

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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.