right , any real hardware manufacturer will use SSL cert issued for 3 months ...
issued to ubimust.com
valid 8/8/2018 to 11/07/2018
3 months is the standard length of time for a Let's Encrypt certificate.
https://letsencrypt.org/There is nothing wrong with a certificate issued in this way, versus one issued from any other certificate authority.
SSL certificates are not indicators of trustworthiness, they are merely conduits for encrypting web traffic!