Firmware
General_VTHX421H-data_MultiLang_Eng_SIP_PART_V4.500.0000002.0.R.20210520.zip
ASM firmware released May 20, 2021. May work with 10 devices, including VTH2421F, VTH2421FS-SH, VTH2421F_R.
- Released
- May 20, 2021
- Version
- V4.500.0000002.0.R
- Size
- 789.9 KB
- Hardware
- 10 devices
Download
Permanent copy on the Internet Archive (item page)
- MD5
eb643c88297fadb37702b1d3156e649c- SHA-256
2da39b22e172e78da3ee4a1bf4459687cd4e6ceb305af55a5887124f9344ed6f
Where it's published
- Folder: videovratni/stare_firmwary_nepouzivat/VTH2421FB-P/V4.500
- Folder: videovratni/stare_firmwary_nepouzivat/VTH2421FW-P/V4.5/201120_CZ
- Folder: videovratni/stare_firmwary_nepouzivat/VTH5221DW-S2/Firmware/V4.500
- Folder: videovratni/stare_firmwary_nepouzivat/VTH5421EW-H/V4.500
- Folder: videovratni/stare_firmwary_nepouzivat/VTH5441G/FW 4.500
V4.500.0000002.0.R · Listed date May 20, 2021
Previously at 4 other addresses
- https://ftp.asm.cz/Dahua/videovratni/stare_firmwary_nepouzivat/VTH2421FB-P/V4.500/General_VTHX421H-data_MultiLang_Eng_SIP_PART_V4.500.0000002.0.R.20210520.zip (last seen Oct 22, 2026)
- https://ftp.asm.cz/Dahua/videovratni/stare_firmwary_nepouzivat/VTH2421FW-P/V4.5/201120_CZ/General_VTHX421H-data_MultiLang_Eng_SIP_PART_V4.500.0000002.0.R.20210520.zip (last seen Oct 22, 2026)
- https://ftp.asm.cz/Dahua/videovratni/stare_firmwary_nepouzivat/VTH5221DW-S2/Firmware/V4.500/General_VTHX421H-data_MultiLang_Eng_SIP_PART_V4.500.0000002.0.R.20210520.zip (last seen Oct 22, 2026)
- https://ftp.asm.cz/Dahua/videovratni/stare_firmwary_nepouzivat/VTH5421EW-H/V4.500/General_VTHX421H-data_MultiLang_Eng_SIP_PART_V4.500.0000002.0.R.20210520.zip (last seen Oct 22, 2026)
Compatible hardware
Hardware IDs this firmware's installer accepts (10 devices).
- VTH2421F
- VTH2421FS-SH
- VTH2421F_R
- VTH5221D-S
- VTH5221D-S-SH
- VTH5241D-S
- VTH5241D-S-SH
- VTH5421CH
- VTH5421E-H
- VTH5441G
Where these IDs come from
- Install in General_VTHX421H-data_MultiLang_Eng_SIP_PART_V4.500.0000002.0.R.20210520.bin: the installer's device list (board families), 10 IDs, vendor General
Technical details
Read from inside the firmware (zip archive).
- OEM build
- General
- Security
- 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 |
|---|---|---|---|---|---|---|
| data | 0x13e0000 | 0x18e0000 | 5.0 MB | data-x.cramfs.img | cramfs | — |
Related firmware
Other files for much of the same hardware, from any vendor.
- General_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527.zip
Released Jun 12, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
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Released Jun 12, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- General_VTHX421H_MultiLang_SIP_EMEA_V4.810.0000000.4.R.260527.zip
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- DH_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527.zip
Released May 27, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_CEE-Nordic_V4.810.0000000.4.R.260527.zip
Released May 27, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_EMEA_V4.810.0000000.4.R.260527.zip
Released May 27, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.3.R.260410.zip
Released Apr 10, 2026 · V4.810.0000000.3.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_CEE-Nordic_V4.810.0000000.3.R.260410.zip
Released Apr 10, 2026 · V4.810.0000000.3.R · 10 devices · Dahua