CVE-2000-0570: Centrinity Firstclass Intranet Server

Medium severity, CVSS 5.0. EPSS: 3.1% chance of exploitation in the next 30 days.

FirstClass Internet Services server 5.770, and other versions before 6.1, allows remote attackers to cause a denial of service by sending an email with a long To: mail header.

Affected products

• Centrinity Firstclass Intranet Server: version 5.770 only

Published 2000-06-27. Last modified 2026-06-16.