CVE-2012-0143: Microsoft Excel 2003 SP3 and Office 2008 for Mac do not properly handle memory during the opening of files,...

Security readout for executives and security teams

This is a legacy Microsoft Excel vulnerability that can let an attacker run code if a user opens a malicious spreadsheet. The sources identify Excel 2003 SP3 and Office 2008 for Mac. Business urgency depends on whether these obsolete Office versions still exist in the environment. Exposure is most likely on endpoints still running Microsoft Excel 2003 SP3 or Microsoft Office 2008 for Mac, especially where users can receive or open external spreadsheet files. Prioritize remediation if any legacy Office installations remain. If those products are absent, document non-exposure and keep evidence from inventory or vulnerability scans. Mitigation focus: Check Microsoft MS12-030 for the applicable security update and deployment guidance.; Remove or isolate unsupported Excel 2003 and Office 2008 for Mac installations.; Limit opening of unsolicited spreadsheet files on any affected legacy systems..

Prepared

Jun 24, 2026, 12:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.