CVE-2009-0556highunder attackCWE-94

CVE-2009-0556

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63Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.8epss 67%
from disclosure to weapon
Published on NVDApr 3
CISA KEV+6123d
Action required by CISAfederal deadline: 2026-01-28

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

In short

A flaw in Microsoft PowerPoint allows attackers to run malicious code by sending a specially crafted PowerPoint file that corrupts memory when opened. This can give attackers full control of your computer.

Technical detail

CVE-2009-0556 is a memory corruption vulnerability in PowerPoint 2000-2003 (and Mac Office 2004) triggered by a malformed OutlineTextRefAtom with an invalid index value in a .ppt file. The attack requires user interaction (opening the file) and results in arbitrary code execution with user privileges. This was actively exploited by Exploit:Win32/Apptom.gen in April 2009.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
n/a · n/a