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CVE-2012-1891

Microsoft Data Access Components (MDAC) - Microsoft Data Access Components

Microsoft CVSS 9.8 Updated April 30, 2026

Executive Risk Summary

"A heap-based buffer overflow vulnerability exists in Microsoft Data Access Components (MDAC) that allows remote attackers to execute arbitrary code via crafted XML data. This vulnerability can be exploited by sending specially crafted XML data to a vulnerable system, potentially leading to code execution and system compromise."

Anticipated Attack Path

  1. 1. Initial Exploitation: Attacker sends crafted XML data to a vulnerable system
  2. 2. Privilege Escalation: Arbitrary code execution is achieved, potentially leading to system compromise
  3. 3. Lateral Movement: Attacker may attempt to move laterally within the network

Am I Vulnerable?

  • Verify MDAC version and patch level
  • Monitor system logs for suspicious activity
  • Implement network segmentation and access controls

Operational Audit Arsenal

Target Type Windows Service
Target Asset msadce.dll
Standard Path C:\Windows\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: msadce.dll (Windows Service)
$Targets = 'msadce.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

Potential disruption to database and data access services

Internal Work Notes

Urgent: Apply MS12-045 patch to vulnerable Microsoft Data Access Components (MDAC) systems to prevent remote code execution via crafted XML data.

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.