WRT1900ACS Downloads
The hardware version is located beside or beneath the model number and is labeled version, ver., or V. If there is no version number beside the model number on your Linksys product, the device is version 1. If you still have trouble finding your version number, see the complete article to learn more.
Select your version:
Firmware
Ver. 2.0.4.216955
Latest Date: 10/15/2026
Download 31.6 MB
Release Notes
IMPORTANT: The WRT1900ACS v2 firmware is not compatible with the WRT1900ACS v1.
Firmware
Ver. 1.0.4.216955
Latest Date: 10/13/2026
Download 31.6 MB
Release Notes
NOTE: After downloading the firmware, you need to load the file onto your router to improve its functionality. For instructions on how to update the firmware of your Linksys Smart WiFi Router, click here.
WRT1900ACS Documents
Version 2.0
Required Agreements and Warranties
Version 1.0
Required Agreements and Warranties
WRT1900ACS User Guides
Version 2.0
Version 1.0
