CVE-2007-0221: Microsoft Exchange Server

High severity, CVSS 7.8. EPSS: 37.2% chance of exploitation in the next 30 days.

Integer overflow in the IMAP (IMAP4) support in Microsoft Exchange Server 2000 SP3 allows remote attackers to cause a denial of service (service hang) via crafted literals in an IMAP command, aka the "IMAP Literal Processing Vulnerability."

Affected products

• Microsoft Exchange Server: version 2000 only

Published 2007-05-08. Last modified 2026-06-16.