Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded OAUTH_SECRET_KEY in /opt/axess/etc/default/axess.
- https://www.zyxel.com/support/vulnerabilities-of-CloudCNM-SecuManager.shtml
- https://github.com/Live-Hack-CVE/CVE-2020-15331