Firmware
General_NVR2X-4KS3_MultiLang_V4.000.0000000.1.R.231025.zip
CCTV App firmware released Oct 25, 2023. Encrypted firmware.
- Released
- Oct 25, 2023
- Version
- V4.000.0000000.1.R
- Size
- 142.8 MB
- Hardware
- Encrypted firmware
Download
Permanent copy on the Internet Archive (item page)
- MD5
b79d49e9b1fc17d751542cd2c598a591- SHA-256
181103cb7dc7bf9190b05ccd24b8e5e13100c820c3fd1ef9423c3d8a8879e291
Where it's published
Recovered from the Wayback Machine
CCTV App
Wayback Machine (files.cctvapp.net)
Wayback copyCaptured Dec 31, 2025 from
https://files.cctvapp.net/Firmware/Dahua/Network-Recoder/NVR/NVR-S3/NVR2X-4KS3/General_NVR2X-4KS3_MultiLang_V4.000.0000000.1.R.231025.zip- Recovered from the Wayback Machine (captured 2025-12-31)
V4.000.0000000.1.R · Listed date Oct 25, 2023
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.
Technical details
Read from inside the firmware (bundle of several firmwares). This file bundles 5 firmware images.
algorithm-x.squashfs.img
- SoC
- Novatek NT98631
- Architecture
- arm
- Image dates
- Oct 25, 2023
- Security
- Not signed, encrypted
Flash layout: 1 partition, 1 written by this firmware
From the image headers (only partitions this firmware writes).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| algorithm | 0xa4a80000 | 0xa6f80000 | 37.0 MB | algorithm-x.squashfs.img | squashfs | 2023-10-25 |
custom-x.squashfs.img
- SoC
- Novatek NT98631
- Architecture
- arm
- Image dates
- Oct 25, 2023
- Security
- Not signed
Flash layout: 1 partition, 1 written by this firmware
From the image headers (only partitions this firmware writes).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| custom | 0xa3780000 | 0xa3980000 | 2.0 MB | custom-x.squashfs.img | squashfs | 2023-10-25 |
logo-x.squashfs.img
- SoC
- Novatek NT98631
- Architecture
- arm
- Image dates
- Oct 25, 2023
- Security
- Not signed, encrypted
Flash layout: 1 partition, 1 written by this firmware
From the image headers (only partitions this firmware writes).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| logo | 0xa4880000 | 0xa4a80000 | 2.0 MB | logo-x.squashfs.img | squashfs | 2023-10-25 |
u-boot.bin.img
- SoC
- Novatek: one of NT98331, NT98631
- Architecture
- arm
- Bootloader
- U-Boot 2019.04-svn7069
- Image dates
- Oct 25, 2023
- Security
- Not signed
Flash layout: 1 partition, 1 written by this firmware
From the image headers (only partitions this firmware writes).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| u-boot | 0xa0080000 | 0xa0280000 | 2.0 MB | u-boot.bin.img | — | 2023-10-25 |
web-x.squashfs.img
- SoC
- Novatek NT98631
- Architecture
- arm
- Image dates
- Oct 25, 2023
- Security
- Not signed, encrypted
Flash layout: 1 partition, 1 written by this firmware
From the image headers (only partitions this firmware writes).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| web | 0xa3980000 | 0xa4880000 | 15.0 MB | web-x.squashfs.img | squashfs | 2023-10-25 |