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CVE-2009-0556

Published: Apr 3, 2009Updated: Apr 22, 2026 Sources: CVE List NVDCWE-94
8.8HIGH
NVD MITRE
EPSS Score
67.5%
Top 0.8%
CISA KEV
Active Exploitation
Since Jan 7, 2026
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Microsoft Office PowerPoint 2000 SP3, 2002 SP3, and 2003 SP3, and PowerPoint in Microsoft Office 2004 for Mac, allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an an invalid index value that triggers memory corruption, as exploited in the wild in April 2009 by Exploit:Win32/Apptom.gen, aka "Memory Corruption Vulnerability."

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-94

Affected Products

microsoft
commercial·US
office powerpointOn-premDesktop App
Consumer Software / productivity
powerpointOn-premDesktop App
Consumer Software / productivity
and 1 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Jan 7, 2026
Remediation due:Jan 28, 2026

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Official Patch Available
Is your org exposed to CVE-2009-0556?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

http://blogs.technet.com/mmpc/archive/2009/04/02/new-0-day-exploits-using-powerpoint-files.aspx
blogs.technet.com
http://blogs.technet.com/msrc/archive/2009/04/02/microsoft-security-advisory-969136.aspx
blogs.technet.com
http://blogs.technet.com/srd/archive/2009/04/02/investigating-the-new-powerpoint-issue.aspx
blogs.technet.com
and 16 more references View all →

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