CVE-2020-28019: Exim

High severity, CVSS 7.5. EPSS: 61.7% chance of exploitation in the next 30 days.

Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other consequences. This occurs because use of certain getc functions is mishandled when a client uses BDAT instead of DATA.

Affected products

• Exim Exim: from 4.88, before 4.94.2 (fixed in 4.94.2)

Published 2021-05-06. Last modified 2026-06-17.