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Firmware

General_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527.zip

Dahua firmware released Jun 12, 2026. May work with 10 devices, including VTH2421F, VTH2421FS-SH, VTH2421F_R.

Released
Jun 12, 2026
Version
V4.810.0000000.4.R
Size
40.8 MB
Hardware
10 devices

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5
d3636e595f757b7a903e5d19158d19ce
SHA-256
ab175dfa61f640e14fa11c90d1893a4271f2651d34b9d7f4e14f277b4b1e9fa6
Changelog
Release notes

Where it's published

Compatible hardware

Hardware IDs this firmware's installer accepts (10 devices).

Where these IDs come from
  • Install in General_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527_part1.bin: the installer's device list (board families), 10 IDs, vendor General
  • Install in General_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527_part2.bin: the installer's device list (board families), 10 IDs, vendor General

Technical details

Read from inside the firmware (bundle of several firmwares). This file bundles 2 firmware images.

General_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527_part1.bin

Architecture
arm
OEM build
General
Bootloader
U-Boot 2011.09-rc1-svn9727
Flash
40.0 MB
Image dates
May 27, 2026
Security
Signed, security baseline V2.4
Language & video
English by default · 7 languages · PAL
Supported languages (7)

English, TradChinese, TradChinese2, Japanese, Korean, Vietnamese, Thai

Flash layout: 13 partitions, 9 written by this firmware

From the firmware's partition table (partitionV2.txt).

PartitionStartEndSizeImageFilesystemBuilt
boot00x00x40000256.0 KBboot0.bin.img—2026-05-27
boot0x400000x2800002.3 MBuboot.bin.img—2026-05-27
mbr0x2800000x2a0000128.0 KBmbr.img—2026-05-27
env0x2a00000x2c0000128.0 KBnot written——
updateflag0x2c00000x3c00001.0 MBnot written——
partition(ro)0x3c00000x4c00001.0 MBpartition-x.cramfs.imgcramfs2026-05-27
kernel0x4c00000x9c00005.0 MBkernel-x.cramfs.imgcramfs2026-05-27
romfs(ro)0x9c00000xec00005.0 MBnot writtencramfs—
logo(ro)0xec00000xee0000128.0 KBnot written——
web(ro)0xee00000x13e00005.0 MBweb-x.cramfs.imgcramfs2026-05-27
data(ro)0x13e00000x18e00005.0 MBdata-x.cramfs.imgcramfs2026-05-27
usr(ro)0x18e00000x27e000015.0 MBusr-x.cramfs.imgcramfs2026-05-27
pd(ro)0x27e00000x2800000128.0 KBpd-x.cramfs.imgcramfs2026-05-27

General_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527_part2.bin

Architecture
arm
OEM build
General
Bootloader
U-Boot 2011.09-rc1-svn9727
Flash
40.0 MB
Image dates
May 27, 2026
Security
Signed, security baseline V2.4
Language & video
English by default · 7 languages · PAL
Supported languages (7)

English, TradChinese, TradChinese2, Japanese, Korean, Vietnamese, Thai

Flash layout: 13 partitions, 12 written by this firmware

From the firmware's partition table (partitionV2.txt).

PartitionStartEndSizeImageFilesystemBuilt
boot00x00x40000256.0 KBboot0.bin.img—2026-05-27
boot0x400000x2800002.3 MBuboot.bin.img—2026-05-27
mbr0x2800000x2a0000128.0 KBmbr.img—2026-05-27
env0x2a00000x2c0000128.0 KBenv-x.cramfs.imgcramfs2026-05-27
updateflag0x2c00000x3c00001.0 MBnot written——
partition(ro)0x3c00000x4c00001.0 MBpartition-x.cramfs.imgcramfs2026-05-27
kernel0x4c00000x9c00005.0 MBkernel-x.cramfs.imgcramfs2026-05-27
romfs(ro)0x9c00000xec00005.0 MBromfs-x.cramfs.imgsquashfs2026-05-27
logo(ro)0xec00000xee0000128.0 KBlogo-x.cramfs.imgcramfs2026-05-27
web(ro)0xee00000x13e00005.0 MBweb-x.cramfs.imgcramfs2026-05-27
data(ro)0x13e00000x18e00005.0 MBdata-x.cramfs.imgcramfs2026-05-27
usr(ro)0x18e00000x27e000015.0 MBusr-x.cramfs.imgcramfs2026-05-27
pd(ro)0x27e00000x2800000128.0 KBpd-x.cramfs.imgcramfs2026-05-27

About the security baseline: firmware with a higher security baseline can stop a device going back to older firmware. A device already on a higher baseline than V2.4 may refuse this file, and after installing it you may not be able to downgrade to firmware with a lower baseline.

Other files for much of the same hardware, from any vendor.