Hongdian H8922 3.0.5 is susceptible to information disclosure. An attacker can access cli.conf (with the administrator password and other sensitive data) via /backup2.cgi and thereby possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
View the template here CVE-2021-28150.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2021-28150