CVE-2002-1179: Microsoft Outlook Express

High severity, CVSS 7.5. EPSS: 22.1% chance of exploitation in the next 30 days.

Buffer overflow in the S/MIME Parsing capability in Microsoft Outlook Express 5.5 and 6.0 allows remote attackers to execute arbitrary code via a digitally signed email with a long "From" address, which triggers the overflow when the user views or previews the message.

Affected products

• Microsoft Outlook Express: version 5.5 only; version 6.0 only

Published 2002-10-28. Last modified 2026-06-16.