CVE-2009-0556

8.8 HIGH 67% exploit odds exploited in the wild Fix listed Injection

What it is

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."

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2009-02-12 00:00 UTC ReservedThe CVE id was reserved by its CNA
2009-04-03 18:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-01-07 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2026-01-28 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-16 23:05 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 67.3% in the next 30 days (EPSS).
Severity: 8.8 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2009-04-03 18:30 UTC
Last modified: 2026-06-16 23:05 UTC
Added to CISA KEV: 2026-01-07
Exploit probability: 67.3% · EPSS, next 30 days
Weakness: CWE-94 · Code injection
Record status: Analyzed

Affected

Microsoft Office Powerpoint 2004
Microsoft Powerpoint 2000
Microsoft Powerpoint 2002
Microsoft Powerpoint 2003

Attack profile CVSS 3.1 · 8.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-0556.md and follow it. Check whether this project is affected by CVE-2009-0556. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

· More options · Status badge

Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record