April 14, 2026 · Applied Cybernetics Group
CVE-2009-0238 — Microsoft Office
Microsoft Office Remote Code Execution
- Added to KEV
2026-04-14- Federal due date
2026-04-28- Vendor
- Microsoft
- Product
- Office
- EPSS
- 98.9th percentile (score 0.747, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2009-0238
CISA short description
Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.
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.