Home Microsoft CVE-2026-21264
Back to Microsoft

CVE-2026-21264

Microsoft Account - Web Interface

Microsoft CVSS 9.3 Updated March 15, 2026

Executive Risk Summary

"A cross-site scripting vulnerability in Microsoft Account allows an unauthorized attacker to perform spoofing over a network, potentially leading to sensitive information disclosure. This vulnerability can be exploited by an attacker to inject malicious scripts into the web page, compromising the security of the Microsoft Account."

Operational Audit Arsenal

Target Type DLL
Target Asset msaccnt.dll
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: msaccnt.dll (DLL)
$Targets = 'msaccnt.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

CVE-2026-21264: Microsoft Account cross-site scripting vulnerability, requires immediate attention and patching to prevent potential security breaches.

Technical Intelligence & Operational Utilities • Delivered Weekly

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.