CVE-2001-0999: Microsoft Outlook Express

High severity, CVSS 7.5. EPSS: 12.3% chance of exploitation in the next 30 days.

Outlook Express 6.00 allows remote attackers to execute arbitrary script by embedding SCRIPT tags in a message whose MIME content type is text/plain, contrary to the expected behavior that text/plain messages will not run script.

Affected products

• Microsoft Outlook Express: version 6.0 only

Published 2001-09-12. Last modified 2026-06-16.