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CRITICAL: THIS VULNERABILITY IS ACTIVELY BEING EXPLOITED IN THE WILD (CISA KEV CATALOG)
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CVE-2009-0556

Exploited

Microsoft Office - PowerPoint

Microsoft CVSS 8.8 Updated April 30, 2026

Executive Risk Summary

"A memory corruption vulnerability exists in Microsoft Office PowerPoint that allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an invalid index value. This vulnerability can be exploited by an attacker to gain control of the affected system."

Anticipated Attack Path

  1. 1. Phishing or social engineering to deliver malicious PowerPoint file
  2. 2. User opens malicious PowerPoint file, triggering memory corruption
  3. 3. Attacker gains control of the affected system

Am I Vulnerable?

  • Verify Microsoft Office PowerPoint version
  • Check for presence of MS09-017 patch
  • Block or restrict PowerPoint files from untrusted sources

Operational Audit Arsenal

Target Type Process
Target Asset powerpnt.exe
Standard Path C:\Program Files\Microsoft Office\Office\powerpnt.exe
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: powerpnt.exe (Process)
$Targets = 'powerpnt.exe'
$SearchPaths = @("$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

Minimal, but may require restarting Microsoft Office applications

Internal Work Notes

Apply MS09-017 patch to vulnerable Microsoft Office PowerPoint installations to prevent arbitrary code execution

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttp://blogs.technet.com/mmpc/archive/2009/04/02/new-0-day-exploits-using-powerpoint-files.aspx
Official Advisoryhttp://blogs.technet.com/msrc/archive/2009/04/02/microsoft-security-advisory-969136.aspx
Official Advisoryhttp://blogs.technet.com/srd/archive/2009/04/02/investigating-the-new-powerpoint-issue.aspx
Official Advisoryhttp://osvdb.org/53182
Official Advisoryhttp://secunia.com/advisories/34572
Official Advisoryhttp://www.kb.cert.org/vuls/id/627331
MSRC Advisoryhttp://www.microsoft.com/technet/security/advisory/969136.mspx
Official Advisoryhttp://www.securityfocus.com/archive/1/503453/100/0/threaded
Official Advisoryhttp://www.securityfocus.com/bid/34351
Official Advisoryhttp://www.securitytracker.com/id?1021967
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA09-132A.html
Official Advisoryhttp://www.vupen.com/english/advisories/2009/0915
Official Advisoryhttp://www.vupen.com/english/advisories/2009/1290
Official Advisoryhttp://www.zerodayinitiative.com/advisories/ZDI-09-019
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-017
Official Advisoryhttps://exchange.xforce.ibmcloud.com/vulnerabilities/49632
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6204
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6279
Official Advisoryhttp://blogs.technet.com/mmpc/archive/2009/04/02/new-0-day-exploits-using-powerpoint-files.aspx
Official Advisoryhttp://blogs.technet.com/msrc/archive/2009/04/02/microsoft-security-advisory-969136.aspx
Official Advisoryhttp://blogs.technet.com/srd/archive/2009/04/02/investigating-the-new-powerpoint-issue.aspx
Official Advisoryhttp://osvdb.org/53182
Official Advisoryhttp://secunia.com/advisories/34572
Official Advisoryhttp://www.kb.cert.org/vuls/id/627331
MSRC Advisoryhttp://www.microsoft.com/technet/security/advisory/969136.mspx
Official Advisoryhttp://www.securityfocus.com/archive/1/503453/100/0/threaded
Official Advisoryhttp://www.securityfocus.com/bid/34351
Official Advisoryhttp://www.securitytracker.com/id?1021967
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA09-132A.html
Official Advisoryhttp://www.vupen.com/english/advisories/2009/0915
Official Advisoryhttp://www.vupen.com/english/advisories/2009/1290
Official Advisoryhttp://www.zerodayinitiative.com/advisories/ZDI-09-019
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-017
Official Advisoryhttps://exchange.xforce.ibmcloud.com/vulnerabilities/49632
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6204
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6279
Official Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-0556

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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.