Dahua model
VTH5221DB-S2/VTH5221DW-S2
Dahua lists 8 firmware files for the VTH5221DB-S2/VTH5221DW-S2. This is the retail model name. Inside the firmware, Dahua uses its own device IDs, listed below, which can lead you to more compatible firmware.
- Firmware files
- 8
- Newest
- May 27, 2026
- Listed by
- Dahua
- Dahua device IDs
- 10
Vendor notes
- An earlier build still on Dahua's download server after the download center replaced it
Firmware
- DH_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.4.R.260527.zipDownload
Released May 27, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_CEE-Nordic_V4.810.0000000.4.R.260527.zipDownload
Released May 27, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_EMEA_V4.810.0000000.4.R.260527.zipDownload
Released May 27, 2026 · V4.810.0000000.4.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_Asia_V4.810.0000000.3.R.260410.zipDownload
Released Apr 10, 2026 · V4.810.0000000.3.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_CEE-Nordic_V4.810.0000000.3.R.260410.zipDownload
Released Apr 10, 2026 · V4.810.0000000.3.R · 10 devices · Dahua
- DH_VTHX421H_MultiLang_SIP_EMEA_V4.810.0000000.3.R.260410.zipDownload
Released Apr 10, 2026 · V4.810.0000000.3.R · 10 devices · Dahua
- 1007136036419.zipDownload
Released Sep 27, 2022 · V4.600.0000000.0.R · 10 devices · Dahua
- 1942554266821.zipDownload
Released Aug 19, 2022 · V4.600.0000000.0.R · 10 devices · Dahua, Global DS, ASM
Dahua device IDs in this firmware
Compare these with the updateSerial your device reports. Each one links to every firmware found for that ID.