March 3, 2022 · Applied Cybernetics Group
CVE-2009-3129 — Microsoft Excel
Microsoft Excel Featheader Record Memory Corruption Vulnerability
- Added to KEV
2022-03-03- Federal due date
2022-03-24- Vendor
- Microsoft
- Product
- Excel
- EPSS
- 99.7th percentile (score 0.857, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2009-3129
CISA short description
Microsoft Office Excel allows remote attackers to execute arbitrary code via a spreadsheet with a FEATHEADER record containing an invalid cbHdrData size element that affects a pointer offset.
Required action
Apply updates per vendor instructions.