Microsoft Excel 2002 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac obtain a certain length value from an uninitialized memory location, which allows remote attackers to trigger a buffer overflow and execute arbitrary code via a crafted Excel file, aka "Excel Data Initialization Vulnerability."
Use CWE-119, Microsoft vendor hub and Excel product page to widen CVE-2011-0105 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2026-26109, CVE-2026-26112 and CVE-2026-26108 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.