How to Reset Hikvision Camera/DVR/NVR Password - 2020 Version
How to Reset Hikvision NVR/DVR Password using SADP
Hikvision - Clearing Passwords and/or Loading Firmware via TTL Serial | IP Cam Talk
DVR motherboard hard reset (no reset button) - Digital Video Recorders - CCTVForum.com
GitHub - bp2008/HikPasswordHelper: A tool which exploits a backdoor in Hikvision camera firmwares circa 2014-2016 to help the owner change a forgotten password.