CVE-2026-94057: Exim

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.

Affected products

• Exim Exim: before 4.100.1 (fixed in 4.100.1)

Published 2026-09-19. Last modified 2026-09-24.