Longse NVR (Network Video Recorder) model NVR3608PGE2W, as well as products based on this device, create a WiFi network with a default password. A user is neither advised to change it during the installation process, nor such a need is described in the manual. As the cameras from the same kit connect automatically, it is very probable for the default password to be left unchanged.
The product uses default credentials (such as passwords or cryptographic keys) for potentially critical functionality.