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CVE-2009-0556

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

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."

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
Open in CVSS calculator →

Weaknesses

CWE-94

Affected Products

office powerpointmicrosoft
On-premDesktop App
Consumer Software / productivity
powerpointmicrosoft
On-premDesktop App
Consumer Software / productivity
n/an/a
microsoftcommercialUSOperating Systems

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

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

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 →

Timeline

Published
Apr 3, 2009
Added to CISA KEV
Jan 7, 2026
Last Updated
Apr 22, 2026

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