CVE-1999-0284: IBM Lotus Domino Mail Server

High severity, CVSS 7.5. EPSS: 11.5% chance of exploitation in the next 30 days.

Denial of service to NT mail servers including Ipswitch, Mdaemon, and Exchange through a buffer overflow in the SMTP HELO command.

Affected products

• IBM Lotus Domino Mail Server: any version
• Microsoft Exchange Server: version 4.0 only; version 5.0 only

Published 1998-01-01. Last modified 2026-06-16.