Microsoft Office PowerPoint Code Injection Vulnerability
Description
Microsoft Office PowerPoint contains a code injection vulnerability that allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an invalid index value that triggers memory corruption.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Microsoft
- Product
- Microsoft Office PowerPoint
- CVE
- CVE-2009-0556
- Affected versions
- PowerPoint 2000: PowerPoint 2000 SP3
PowerPoint 2002: PowerPoint 2002 SP3
PowerPoint 2003: PowerPoint 2003 SP3
Office for Mac (PowerPoint) 2004: Office 2004 for Mac (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 8.8
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- January 28, 2026 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- January 7, 2026
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.