January 7, 2026 · Applied Cybernetics Group
CVE-2009-0556 Microsoft Office
Microsoft Office PowerPoint Code Injection Vulnerability
- Added to KEV
2026-01-07- Federal due date
2026-01-28- Vendor
- Microsoft
- Product
- Office
- EPSS
- 99.3th percentile (score 0.673, as of
2026-11-06) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2009-0556
CISA short 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.
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.