CVE-2026-94056: Exim

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.

Affected products

• Exim Exim: before 4.100.1 (fixed in 4.100.1)

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