CVE-2020-10957: Dovecot

High severity, CVSS 7.5. EPSS: 7.2% chance of exploitation in the next 30 days.

In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP command causes a NULL Pointer Dereference and crash in submission-login, submission, or lmtp.

Affected products

• Dovecot Dovecot: before 2.3.10.1 (fixed in 2.3.10.1)

Published 2020-05-18. Last modified 2026-06-17.