CVE-2011-1277: Microsoft Excel

High severity, CVSS 9.3. EPSS: 16.1% chance of exploitation in the next 30 days.

Microsoft Excel 2002 SP3, Office 2008 for Mac, and Open XML File Format Converter for Mac do not properly validate record information during parsing of Excel spreadsheets, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted spreadsheet, aka "Excel Memory Corruption Vulnerability."

Affected products

• Microsoft Excel: version 2002 only
• Microsoft Office: version 2008 only
• Microsoft Open XML File Format Converter: any version

Published 2011-06-16. Last modified 2026-06-16.