CVE-2026-94054: Exim

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

Affected products

• Exim Exim: before 4.100.1 (fixed in 4.100.1)

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