Forgotten Password Hikvision/Dahua/XM/Hisilicon IP Cameras, How to Reset?
Hikvision DVR 7208HGHI-SH:Unable to reset the Admin Password - 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.
How to Recover/Reset Hikvision DVR Forgotten Admin Password Free & Easy - YouTube