This update resolves the "Unchecked Buffer in Outlook Express S/MIME Parsing Could Enable System Compromise (Q328676)" vulnerability in Outlook Express. Download now to keep your computer secure.

For more information about the vulnerabilities this update addresses, read the associated Microsoft Security Bulletin. (This site may be in English.)

Note: If you are running Outlook Express 5.5 Service Pack 2 (SP2) or Windows 2000 Service Pack 3 (SP3), Windows Update offers the executable file Q328389.exe, which includes the fix discussed in Microsoft Knowledge Base (KB) Article Q328676.