The Hikvision UK portal provides structured directories for K2, K4, and K8 series firmware.

After 72 hours, I didn't find the link. I found something better: a Russian forum post from 2021. The user, vadim_elec , had the same problem. He solved it not by downloading firmware, but by and forcing a recovery using a similar model’s bootloader (the DS-7616NXI-I2).

The firmware for the Hikvision DS-7616NI-K2 NVR is typically found on the official Hikvision download portals, though it is critical to select the version that matches your specific region and hardware revision to avoid "firmware mismatch" errors. Direct Firmware Links Official Hikvision Portal:

: Access the specific directory for K-series NVRs including the DS-7616NI-K2 Global Support Center

In many official databases, the K-series is listed as DS-7616NI-K2 . However, user stickers on the bottom of the unit often read DS-7616NI-K2 or sometimes DS-7616NI-K2/16P (indicating PoE ports). The missing "I" or the presence of "P" often confuses search engines, leading users to firmware for the wrong device (such as the DS-7616NI-I2, which is incompatible).