CVE-2004-2328: Clearswift Mailsweeper

Medium severity, CVSS 5.0. EPSS: 1.6% chance of exploitation in the next 30 days.

Clearswift MAILsweeper for SMTP before 4.3_13 allows remote attackers to cause a denial of service (infinite loop) via an e-mail with a crafted RAR archive attached.

Affected products

• Clearswift Mailsweeper: version 4.0 only; version 4.1 only; version 4.2 only; version 4.3 only; version 4.3.3 only; version 4.3.4 only; …

Published 2004-12-31. Last modified 2026-06-16.