CVE-2006-5574: Unspecified vulnerability in the Brazilian Portuguese Grammar Checker in Microsoft Office 2003 and the Mult...

Security readout for executives and security teams

This is a legacy Microsoft Office 2003 issue where crafted text could make the Brazilian Portuguese grammar checker mishandle parsing and run attacker-controlled code. It requires user interaction with malicious content. Business risk is highest where Office 2003, Project 2003, Visio 2003, or 2003 Multilingual Interface components remain deployed. Exposure is limited to environments retaining the named Office 2003-era products or language components, especially systems that process untrusted documents or text. Modern environments without these components are unlikely to be exposed based on the provided sources. Prioritize remediation if any Office 2003-era software remains in production or sensitive environments. The issue enables code execution after user interaction, but the available evidence is old and incomplete, with no supplied proof of active exploitation. Mitigation focus: Apply Microsoft guidance and updates from MS07-001 where applicable.; Inventory Office 2003, Project 2003, Visio 2003, and Office 2003 MUI installations.; Remove unused Brazilian Portuguese proofing or multilingual components where operationally feasible..

Prepared

Jun 29, 2026, 08:16 UTC (UTC+00:00)

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