CVE-2018-16494: Versa-Networks Versa Operating System

High severity, CVSS 8.8. EPSS: 1.9% chance of exploitation in the next 30 days.

In VOS and overly permissive "umask" may allow for authorized users of the server to gain unauthorized access through insecure file permissions that can result in an arbitrary read, write, or execution of newly created files and directories. Insecure umask setting was present throughout the Versa servers.

Affected products

• Versa-Networks Versa Operating System: before 16.1r2s11 (fixed in 16.1r2s11); from 20.2.0, before 20.2.2 (fixed in 20.2.2); from 21.1.0, before 21.1.1 (fixed in 21.1.1)

Published 2021-05-26. Last modified 2026-06-17.