CVE-2024-39929: Exim

Medium severity, CVSS 5.4. EPSS: 41.5% chance of exploitation in the next 30 days.

Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.

Affected products

• Exim Exim: up to and including 4.97.1

Published 2024-07-04. Last modified 2026-06-17.