Linksys WRT54GSv4 Wireless-G Router Firmware 4.21.5.000
- This firmware is compatible with WRT54GS hardware version 7.2 only. Please check the bottom of your router to make sure you have the correct version.
- Disconnect all wireless clients from the router during the upgrade process. Make sure no wireless clients attempt to associate with the router until the upgrade process is complete.
(NOTE: Firmware 7.2.06 and above are not compatible with Linksys EasyLink Advisor (LELA) version 1.6. If you would like to continue to use LELA 1.6, do not upgrade the router with these firmware builds.)
- Resolves issue with UPnP denial of service security vulnerability.
In a hurry? Add it to your Download Basket!
It is highly recommended to always use the most recent driver version available. Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games. Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.
- Graphics Board
- Other Drivers & Tools
- Digital Camera / Webcam / Camcorder
- Sound Card
- Printer / Scanner
- Network Card
- Keyboard & Mouse
- Joystick, Gamepad & Wheels
- TV Tuner / Capture Card
- Mobile Phones
- Card Readers
- HDD / SSD / NAS / USB Flash
- TV / HDTV / Projectors
- DVD / Blu-Ray / Media Players
- Router / Switch / AP
- Doesn't matter
- 3 months
- 6 months
- 12 months
- 24 months