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CVE-2013-3894

Windows - Kernel Mode Drivers

Microsoft CVSS 8.1 Updated April 30, 2026

Executive Risk Summary

"The kernel-mode drivers in Microsoft Windows are vulnerable to a remote code execution vulnerability due to a crafted CMAP table in a TrueType font file. This vulnerability can be exploited by an attacker to execute arbitrary code on the affected system."

Anticipated Attack Path

  1. 1. Attacker crafts a malicious TrueType font file with a malformed CMAP table
  2. 2. Victim system processes the malicious font file, triggering the vulnerability
  3. 3. Attacker gains arbitrary code execution on the victim system

Am I Vulnerable?

  • Verify if the system is running a vulnerable version of Windows
  • Check for the presence of the malicious font file
  • Monitor system logs for suspicious activity

Operational Audit Arsenal

Target Type Windows Service
Target Asset win32k.sys
Standard Path C:\Windows\System32\drivers\win32k.sys
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: win32k.sys (Windows Service)
$Targets = 'win32k.sys'
$SearchPaths = @("$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

System restart required, potential disruption to running applications

Internal Work Notes

Apply MS13-081 patch to vulnerable Windows systems to mitigate TrueType font vulnerability

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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.