CVE-2009-0238 — Microsoft Office Remote Code Execution
CVE-2009-0238: Microsoft Office Remote Code Execution
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Microsoft |
| Product | Office |
| Date added | 2026-04-14 |
| Due date | 2026-04-28 |
| Ransomware campaign use | Unknown |
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 (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://learn.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009 ; https://nvd.nist.gov/vuln/detail/CVE-2009-0238
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0238
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog