Firmware

General_NVR4x-EI_MultiLang_V4.005.0000001.6.R.251219.zip

Dahua firmware released Dec 19, 2025. Encrypted firmware.

Released: Dec 19, 2025
Version: V4.005.0000001.6.R
Size: 103.5 MB
Hardware: Encrypted firmware

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5: e5d3bd08df1e027b3bc15c0069e2281c
SHA-256: 81eba84c3a91ed5ec25d62de660e6028059b25d82fad86b7fa4eb0a08ccab1b7

Where it's published

Mirrored by
Dahua
files.dahuatech.support
Mirror
Series: _NVR4xxx-EI
- Folder: Recorders/NVR/_NVR4xxx-EI/old
V4.005.0000001.6.R · Listed date Dec 19, 2025
Mirror link (files.dahuatech.support)

Compatible hardware

This firmware is encrypted (the format Dahua uses for NVR4/NVR5 EI and XI builds), so its contents, including its list of supported hardware, can't be read. Use the model names the vendors list for it instead.