CVE-2017-5899: S-Nail Project S-Nail

High severity, CVSS 7.0. EPSS: 1% chance of exploitation in the next 30 days.

Directory traversal vulnerability in the setuid root helper binary in S-nail (later S-mailx) before 14.8.16 allows local users to write to arbitrary files and consequently gain root privileges via a .. (dot dot) in the randstr argument.

Affected products

• S-Nail Project S-Nail: up to and including 14.8.5

Published 2017-03-27. Last modified 2026-06-17.