CVE-2021-31540: Wowza Streaming Engine

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ directory. A regular local user is able to read and write to all the configuration files, e.g., modify the application server configuration.

Affected products

• Wowza Streaming Engine: up to and including 4.8.5

Published 2021-04-23. Last modified 2026-06-17.