D-Link DAP-1620 is susceptible to local file Inclusion due to path traversal that can lead to unauthorized internal files reading [/etc/passwd] and [/etc/shadow].
View the template here CVE-2021-46381.yaml
References:
http://packetstormsecurity.com/files/167070/DLINK-DAP-1620-A1-1.01-Directory-Traversal.html