CVE-2000-1006: Microsoft Exchange Server

Medium severity, CVSS 5.0. EPSS: 14.8% chance of exploitation in the next 30 days.

Microsoft Exchange Server 5.5 does not properly handle a MIME header with a blank charset specified, which allows remote attackers to cause a denial of service via a charset="" command, aka the "Malformed MIME Header" vulnerability.

Affected products

• Microsoft Exchange Server: version 5.5 only

Published 2000-12-11. Last modified 2026-06-16.