› UKTH forums › 🛜 Wireless Routers & Modems › ASUS & Wireless › ASUS RT-AX59U – Official Thread ASUS RT-AX59U Firmware version 3.0.0.4.388_33144 Version 3.0.0.4.388_33144 2024/01/17 – Resolved IPTV interruptions during extended use. – Addressed Guest Network performance issues with active IPTV. – Added Xtra Range 2.0...
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- March 16, 2026 at 7:00 pm #42172
ASUS RT-AX59U Firmware version 3.0.0.4.388_34011
2026/03/16
Improvements:
Optimized Wi-Fi roaming stability for devices supporting 802.11k but not allowing 11v.
Improved Wi-Fi roaming compatibility and stability for iOS 26 devices.
Refined accessibility-related UI and interaction details.
Improved overall remote connection stability.Security Enhancements:
Strengthened input sanitization mechanism
Enhanced system API validation for stronger protection consistency.
Strengthened command handling and system resource access controls.
Improved system logging and security event recording mechanismsIn a completely sane world, madness is the only freedom (J.G.Ballard).
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May 6, 2026 at 4:20 pm #42668ASUS RT-AX59U Firmware version 3.0.0.4.388_34013
2026/05/06
Security Fixes:
– Enhanced system security by addressing an unsafe remote script execution mechanism in.
– Improved system security by addressing a heap buffer overflow vulnerability during cache handling.
We recommend upgrading to this version to ensure up-to-date protection.In a completely sane world, madness is the only freedom (J.G.Ballard).
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August 12, 2026 at 5:14 pm #43171ASUS RT-AX59U Firmware version 3.0.0.4.388_34098
2026/08/12
New Features
– New Time Zone Options: Added “Vancouver, Whitehorse (PST7)” and “Edmonton, Yellowknife (MST6)” time zone options for Canada.Bug Fixes and Enhancements
– Improved stability during the AiMesh node setup process.Security Fixes
– Strengthened data handling in Networks configuration functions.
– Improved data validation in Networks rule list processing.
– Fixed a data-handling issue in the DNS query caching component.
– Strengthened verification when a software component downloads external resources, improving connection security.
– Adjusted the information response mechanism of the device discovery service, strengthening protection of device information.
– Fixed a data-handling issue in a firmware component on a specific model.
– Strengthened input data validation in a device-pairing web function.
– Improved data validation in the configuration file upload/sync function.
– Improved how the account service restart process is handled.
– Removed a non-essential internal function endpoint, strengthening overall access control.
– Adjusted the debug file access mechanism, strengthening protection of internal data.
– Strengthened data handling in the system logging function.
We recommend upgrading to this version to maintain optimal protection.In a completely sane world, madness is the only freedom (J.G.Ballard).
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October 12, 2026 at 11:24 am #44350ASUS RT-AX59U Firmware version 3.0.0.4.388_34156
2026/10/12
This update includes a required change for the Speedtest service. If Speedtest is supported on your model, you must install this update to continue using it. Please refer to Speedtest Service Announcement for details.
Supports Surfshark VPN account login for a smoother user experience. (Supported model only)
Security Fixes:
Web management interface: Strengthened data handling for the connected device list and added stricter content checks when importing configuration profiles.
Network speed test service: Added allowlist validation for service command parameters, so that only expected values are accepted.
System protection service: Adjusted address parameter validation and event logging, strengthening access control between local services.
Certificate import process: Adjusted file handling and password passing, with stricter parameter validation.
Third-party account authorization: Narrowed the recipients of authorization data to better protect authorization information.
Web management interface: Adjusted the output handling of feedback content.
Notification service: Added identity verification for local connection sources and tightened the related file permission settings.
Mobile device connection authorization: Added a device matching check to strengthen the access token issuance process.
Device discovery service: Removed a non-essential internal function endpoint to strengthen overall access control.
AiMesh: Adjusted data access protection during the node joining process, improving system stability while connections are being established.
System temporary directory: Adjusted the default permissions applied at creation time to narrow local file access.
Network diagnostic data query: Strengthened value range checks for time interval parameters.
Network diagnostic data query: Added allowlist validation for query fields.
Internal data query: Improved field matching logic and optimized the memory release process under error conditions.
Time synchronization settings: Strengthened parameter validation for the server name.
File upload handling: Fixed an issue where certain input formats could cause the web management service to become unresponsive.
Wireless channel selection tool: Adjusted the handling of command parameters to prevent unintended command execution.
Certificate upload: Added a pre-check of archive contents to prevent files from being written to unintended locations.
System configuration file generation: Strengthened parameter content checks to prevent abnormal configuration values from affecting network service settings.
VPN and account authentication services: Adjusted the handling of connection settings and account data, with stricter parameter validation.We recommend updating to this version to maintain optimal protection.
In a completely sane world, madness is the only freedom (J.G.Ballard).
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