Microsoft Office Remote Code Execution
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.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Microsoft
- Product
- Microsoft Office
- CVE
- CVE-2009-0238
- Affected versions
- Excel 2000: Excel 2000 SP3
Excel 2002: Excel 2002 SP3
Excel 2003: Excel 2003 SP3
Excel 2007: Excel 2007 SP1
Excel Viewer 2003: Excel Viewer 2003 Gold and SP3
Excel Viewer: Excel Viewer (all versions)
Office Compatibility Pack 2007: Compatibility Pack 2007 SP1
Office for Mac 2004: Office 2004 for Mac
Office for Mac 2008: Office 2008 for Mac (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 8.8
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- April 28, 2026 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- April 14, 2026
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.