Executive Risk Summary
"An improper access control vulnerability in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally, potentially leading to unauthorized access to sensitive data and system resources. This vulnerability poses a significant risk to Windows systems, as it can be exploited by attackers to gain elevated privileges and carry out malicious activities."
Operational Audit Arsenal
Target Type Driver
Target Asset Ancillary Function Driver for WinSock
Standard Path %windir%System32drivers
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: Ancillary Function Driver for WinSock (Driver)
$Targets = 'Ancillary Function Driver for WinSock'
$SearchPaths = @("$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
Network services may be affected
Internal Work Notes
CVE-2026-21238: Windows Ancillary Function Driver for WinSock vulnerability - prioritize patching to prevent privilege escalation attacks
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.