CVE-2003-0714: Microsoft Exchange Server

High severity, CVSS 7.5. EPSS: 77.6% chance of exploitation in the next 30 days.

The Internet Mail Service in Exchange Server 5.5 and Exchange 2000 allows remote attackers to cause a denial of service (memory exhaustion) by directly connecting to the SMTP service and sending a certain extended verb request, possibly triggering a buffer overflow in Exchange 2000.

Affected products

• Microsoft Exchange Server: version 5.5 only; version 2000 only

Published 2003-11-17. Last modified 2026-06-16.