Release ASUS RT-AC68U / RT-AC66U B1 / RT-AC1900(P/U) Firmware version 3.0.0.4.386_52062 (2025/10/27)

[fruitcornbread]

Version 3.0.0.4.386_52062
99.39 MB
2025/10/27

- Enhanced system stability.
- Enhanced input validation and refactored legacy string handling routines to ensure robust memory management.
- Mitigated security risks in AiCloud service by enforcing strict credential verification, implementing robust file path validation, and hardening command execution logic to prevent unauthorized access and manipulation of system resources.
- Implemented comprehensive validation and expanded command filtering in the web history API.
- Fixed a privilege escalation vector in the IFTTT token exchange mechanism
- Strengthened input validation and directory handling in the VPN configuration upload interface.
- Fixed an issue that allowed certain user settings to be bypassed, improving overall user control and protection.

Please unzip the firmware file, and then verify the checksum.
FW SHA-256 : b3fa1f34c6748ec3f6584337aebe28372eb723d9a826f852a831f0365fff231b

RT-AC68U ZIP SHA-256 : 0A1F4CF46304647B9B7E3F07D98BAE1EFCF55548CD6068C9C25155B7B146AE44
Download RT-AC68U: https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC68U/FW_RT_AC68U_300438652062.zip?model=RT-AC68U

RT-AC68U｜WiFi Routers｜ASUS Global

ASUS has a range of wireless routers suitable for every purpose. Whether it's for your home, for business trips, or for any other need or environment, there's an ASUS router for you.

www.asus.com

RT-AC66U B1 ZIP SHA-256 : 38FFC223BE542E1FB254C30621A03BD9C76AA7530CC3947D29E3FCEE7C3EB921
Download RT-AC66U B1: https://dlcdnets.asus.com/pub/ASUS/...T_AC66U_B1_300438652062.zip?model=RT-AC66U-B1

RT-AC66U B1｜WiFi Routers｜ASUS Global

ASUS has a range of wireless routers suitable for every purpose. Whether it's for your home, for business trips, or for any other need or environment, there's an ASUS router for you.

www.asus.com

RT-AC1900 ZIP SHA-256 : 2C7184BC6E11EF6C709E1CBE22FCC9AA3737A1B83467693273C113573190346A
Download RT-AC1900: https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC1900/FW_RT_AC1900_300438652062.zip?model=RT-AC1900

RT-AC1900 - Support

www.asus.com

RT-AC1900P ZIP SHA-256 : FD876AE5A0AFE2E0C8EFAB3768917AC5FF9E3E55B178D3E26C655301E7CC76EE
Download RT-AC1900P: https://dlcdnets.asus.com/pub/ASUS/..._RT_AC1900P_300438652062.zip?model=RT-AC1900P

RT-AC1900P｜WiFi Routers｜ASUS Global

ASUS has a range of wireless routers suitable for every purpose. Whether it's for your home, for business trips, or for any other need or environment, there's an ASUS router for you.

www.asus.com

RT-AC1900U ZIP SHA-256 : 3C7E30107AC1482C2DDC075CCA23F96416DEDA5788D80CDAD0578A8C984D1491
Download RT-AC1900U: https://dlcdnets.asus.com/pub/ASUS/..._RT_AC1900U_300438652062.zip?model=RT-AC1900U

RT-AC1900U - Support

www.asus.com

 

[jksmurf]

The venerable RT-AC68U gets yet another update. Go you good thing …

 

[bennor]

And the old end of support RT-AC68U keeps chugging along.

 

[visortgw]

Download Page (links above expired).

 

[New2This]

Guess its time to update ........

 

[wouterv]

Did a dirty (online) upgrade of the loyal router.

 

[banger]

Did a dirty (online) upgrade of the loyal router.

Me too and a reboot after to make sure.

 

[banger]

Seems ok still weekly rebooting just in case.

 

[wouterv]

Oh right, there is a RT-AC68U Router hanging around here.
Last Tuesday we had a scheduled blackout, otherwise the router is part of the scenery, just there, doing what it should do and not to worry about.

 

[Oniiz86]

Oh right, there is a RT-AC68U Router hanging around here.
Last Tuesday we had a scheduled blackout, otherwise the router is part of the scenery, just there, doing what it should do and not to worry about.

@wouterv I was wondering if you could confirm if your Media Bridge instability & AiMesh issues have been fixed with this 386_52062 firmware?

 

[Tech9]

I don't think any of the firmware updates after EoL fix anything else than urgent security issues.

 

[wouterv]

@wouterv I was wondering if you could confirm if your Media Bridge instability & AiMesh issues have been fixed with this 386_52062 firmware?

I cannot tell you, but I doubt it would as explained by Tech9.
We dismissed the RT-AC1900U Media Bridge a while ago because we finally managed to pull a network cable from the modem to the TV location.
Note: in our setup the RT-AC68U is connected to one port of the fiber optic modem, the remote TV location is connected to the second port of the fiber modem. The RT-AC68U Router now only serves the wireless laptops, phones and printer.
From the early Internet years I enhanced our home network with the first router, wireless access points, wireless routers, repeaters, power line adapters, media bridge to serve a wide variety of networked devices. The recent years it all scaled down back to the very basics.
I suppose when the current fiber optic modem fails, the next step will be fiber optic into an ONT and a router with maybe some mesh structure.
I recently read about the upcoming Wi-Fi 8, which really seems to incorporate mesh technology.

 

[Oniiz86]

I don't think any of the firmware updates after EoL fix anything else than urgent security issues.

@Tech9 That is true but I was very surprised when I reported an issue with Custom Icons functionality that they broke before this model was deemed EoL & last November they released a firmware update within 2 weeks with this singular fix for the Custom Icons issue after I had reported it, I can't believe they even bothered for something trivial & inconsequential, it was a pleasant surprise.

 

[sol1109]

Should this update include a factory reset?

 

[jksmurf]

Should this update include a factory reset?

Some past firmware updates have expressly stated you must do a factory reset.

However unless you are experiencing issues that you cannot solve, OR moving from one codebase to another e.g. 3004.388 to 3006.102, which this older router will never do, OR moving from stock FW to Merlin FW or vice versa, a hard factory is not necessary.

 

[wouterv]

Maybe to be more clear:

• RT-AC68U firmware 3.0.0.4.386.52048 recommended a factory-default reset.
• If you did a factory-default reset after the upgrade to 3.0.0.4.386.52048, you can skip the factory-default reset after the upgrade to 3.0.0.4.386.52062.
• If you upgrade to 3.0.0.4.386.52062 from a firmware older than 3.0.0.4.386.52048 you are recommended to do a factory-default reset.
• The "visual" effect of the factory-default reset after the upgrade to 3.0.0.4.386.52048 or newer is the Password Policy Upgrade - Minimum 10 characters with at least 1 letter, 1 digit and 1 special symbol, and no consecutive identical characters.

As extra note: after the factory-default reset you shall manual configure the router again (do not load an old configuration backup file).

 

[banger]

5ghz seems a bit unstable in Mesh. Trying to figure out if its my client IoT or the mesh router.

 

[wouterv]

5 GHz can be troublesome due to build in protections against radar disturbance, causing pauses in the radio signals or changing channels.
Try a fixed channel out of 36, 40, 44 or 48.
The disadvantage of those channels is that they usually are the most crowded.

 

[bbunge]

5 GHz can be troublesome due to build in protections against radar disturbance, causing pauses in the radio signals or changing channels.
Try a fixed channel out of 36, 40, 44 or 48.
The disadvantage of those channels is that they usually are the most crowded.

RADAR does not bother his routers as they do not use DFS channels.

 

[wouterv]

If not DFS, how would you call the red marked channels below?

The old school weather radar channels 120, 124 and 128 are not supported, but those are a special part within the range of DFS channels.