CVE-2021-27216: Exim

Medium severity, CVSS 6.3. EPSS: 1% chance of exploitation in the next 30 days.

Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options.

Affected products

• Exim Exim: before 4.94.2 (fixed in 4.94.2)

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