Vigor 3912 Series - Older Firmware

Firmware Information
Current Version	4.4.5.2 Release Notes
Release Date	19/12/2025
Support Language	English
Supported Models	Vigor 3912 Vigor 3912S

Firmware Filenames:
The file name extension of the firmware controls which upgrade type is performed. If the file name is unchanged (e.g. is xxxx.sfw) then the upgrade will just upgrade the firmware, whereas renaming the firmware to a .rst extension will wipe all settings back to factory defaults when upgrading the firmware.

Mainline and Stable Firmware Branches:

Mainline - Incorporates new features, bug fixes and firmware improvements.
Stable - Formal releases of firmware incorporating any bug fixes and firmware improvements.

To change firmware from one branch to another as a precaution take a configuration backup before performing the firmware upgrade.

Latest versions: Stable - 4.4.3.8  Mainline - 4.4.5.2