CVE-2009-0556
CISA KEVPublished January 7, 2026 · Updated April 3, 2026
high
Official 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.
Affected Products
| Vendor | Product |
|---|---|
| Microsoft | Office |
Patch Status
Patch by 2026-01-28
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2009-0556.