CVE-2007-0671: Microsoft Office Excel Remote Code Execution Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2025-08-12. EPSS: 43.2% chance of exploitation in the next 30 days.

Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, allows remote user-assisted attackers to execute arbitrary code via unknown attack vectors, as demonstrated by Exploit-MSExcel.h in targeted zero-day attacks.

Affected products

• Microsoft Access: version 2000 only; version 2002 only; version 2003 only
• Microsoft Excel: version 2000 only; version 2002 only; version 2003 only
• Microsoft Excel Viewer: version 2003 only
• Microsoft Frontpage: version 2000 only; version 2002 only; version 2003 only
• Microsoft Infopath: version 2003 only
• Microsoft Office: version 2000 only; version 2003 only; version 2004 only; version xp only
• Microsoft Onenote: version 2003 only
• Microsoft Outlook: version 2000 only; version 2002 only; version 2003 only
• Microsoft PowerPoint: version 2000 only; version 2002 only; version 2003 only
• Microsoft Project: version 2000 only; version 2002 only; version 2003 only
• Microsoft Publisher: version 2000 only; version 2002 only; version 2003 only
• Microsoft Visio: version 2002 only; version 2003 only
• Microsoft Word: version 2000 only; version 2002 only; version 2003 only
• Microsoft Word Viewer: version 2003 only

Published 2007-02-03. Last modified 2026-06-16.