CVE-2000-0216: Microsoft Exchange Server

Medium severity, CVSS 5.0. EPSS: 5.1% chance of exploitation in the next 30 days.

Microsoft email clients in Outlook, Exchange, and Windows Messaging automatically respond to Read Receipt and Delivery Receipt tags, which could allow an attacker to flood a mail system with responses by forging a Read Receipt request that is redirected to a large distribution list.

Affected products

• Microsoft Exchange Server: any version
• Microsoft Outlook: any version
• Microsoft Windows Messaging: any version

Published 2000-02-29. Last modified 2026-06-16.