CVE-2025-21311 | Windows - NTLM Operational Intel

Executive Risk Summary

"The Windows NTLM V1 Elevation of Privilege Vulnerability (CVE-2025-21311) allows an attacker to elevate privileges on a vulnerable system. This vulnerability can be exploited to gain unauthorized access to sensitive data and systems."

Operational Audit Arsenal

Target Type DLL

Target Asset ntdll.dll

Standard Path %windir%\System32

PowerShell

# 🛠️ Senior Engineer Universal Audit
# Target: ntdll.dll (DLL)
$Targets = 'ntdll.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

Authentication services

Internal Work Notes

Apply latest Windows security updates to mitigate NTLM V1 Elevation of Privilege Vulnerability (CVE-2025-21311)

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Intelligence Sources

MSRC Advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21311

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