RT-AX59U
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BIOS & FIRMWARE

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Firmware
ASUS RT-AX59U Firmware version 3.0.0.4.388_34098
Version 3.0.0.4.388_34098
40.43 MB
2026/08/12
SHA-256 :98C842FAA66C1BF85806314E5776A6D356A89ED9E75E730FED86CFC2D8789E99

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.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_34013
Version 3.0.0.4.388_34013
40.35 MB
2026/05/06
SHA-256 :A20147E814F8A89A65B2D27CE0EFD363101BEA4FF2AEF31672E3DF3CE059F31C

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.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_34011
Version 3.0.0.4.388_34011
40.36 MB
2026/03/16
SHA-256 :5B686B01F10760D86FC93029F868BF7820566DE808D05AB3840F2B0740AFBB8E

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 mechanisms

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33965
Version 3.0.0.4.388_33965
40.38 MB
2025/10/23
SHA-256 :FFE1483B3E82AD7581C3C95E12D38009FA8DC63B57D416079AB79FA91F6531BF

- Enhanced system stability.
- Enhanced input validation and refactored legacy string handling routines to ensure robust memory management.
- Implemented comprehensive validation and expanded command filtering in the web history API.
- 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.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33950
Version 3.0.0.4.388_33950
40.39 MB
2025/09/09
SHA-256 :6C7FD6FBA7D1C676FA626D9A043DC88C3CC9F450AD7DFD615C54362C7A9A0B07

Important: After installing this firmware, we strongly recommend performing a factory-default reset to activate every new security adjustment.

Security Enhancements
- Password Policy Upgrade – Minimum of 10 characters, including at least one letter, one digit, and one special character; disallows consecutive identical characters; hardens defense against brute-force attacks.
- HTTPS on 8443 – Management interface now served over TLS by default.
- UPnP Disabled – Universal Plug and Play starts in the off state for reduced surface exposure.
- AiCloud Authentication Hardening (CWE-287) – Added layered verification.
- Authentication Logic Refactor – Removed redundant code paths for a lean sign-in flow.
- Memory Safety Guard (CWE-476) – Introduced null-reference protections across critical services.
- Enhanced IPsec Parameter Validation – The existing input checks have been hardened.
- Data Exposure Mitigation (CWE-200) – Reinforced controls on sensitive pathways.
- Detailed Audit Trails – Expanded logging within the authentication module.

System Improvements
- Connection Stability – Core algorithms refined for steadier links.
- Scheduling Accuracy – Timed tasks execute reliably under PPPoE, PPTP and L2TP WAN modes.
- Client List Maintenance – Resolved an issue that prevented offline devices from being removed from the client list

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33911
Version 3.0.0.4.388_33911
38.87 MB
2025/05/27
SHA-256 :D51E496AB2CE7CC57819171653F13D09666B3853B0A2DFE7E989132E85169800

Fixed the IPTV compatibility issue for Now TV.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33903
Version 3.0.0.4.388_33903
38.87 MB
2025/03/13
SHA-256 :02583B0D0012EF1CB8D65EB39C96CEE0F9A1B2D660321F5FB0D6C6636BAEC7D8

1.Fixed the UI issue in Chrome.
2.Enhanced input parameter handling techniques to improve data processing stability and system security.
3.Enhance system access control mechanisms.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33407
Version 3.0.0.4.388_33407
37.95 MB
2024/12/27
SHA-256 :189F69785031E9C79EEE6B8ACB659D61A540EDA9254A440EB3267E639A7A6025

1. Improved the stability of AiMesh backhaul connections, resulting in a more robust and reliable mesh network performance.
2. Strengthened input validation and data processing workflows, further protecting your information security.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33405
Version 3.0.0.4.388_33405
37.95 MB
2024/12/04

Please unzip the firmware file, and then verify the checksum.
SHA256: 5d9e0a126515610ac7cfe4f92a02fa03ffe4e37cce8eea9167e72814f807c846

- Resolved an issue where the Traffic Analyzer feature was not functioning properly.

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33404
Version 3.0.0.4.388_33404
37.95 MB
2024/11/07

1. Strengthened input validation and data processing workflows to further protect information security.
2. Enhanced AiCloud password protection mechanisms, safeguarding against unauthorized access attempts.
3. Enhanced device security through improved buffer handling in connection features.
4. Refined data handling processes, ensuring secure and accurate information management.
5. Enhanced file access control mechanisms, promoting a more secure operating environment.
6. Strengthened certificate protection, providing enhanced data security.

Please unzip the firmware file, and then verify the checksum.
SHA256: e8ad8b4a89a53b936e85d53072bac38cf26e8711caf58b427c1d822d70ec3e0b

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33392
Version 3.0.0.4.388_33392
37.96 MB
2024/06/28

Bug Fixes and Enhancements:
Resolved an issue where the Traffic Analyzer feature was not functioning properly.

Please unzip the firmware file, and then verify the checksum.
SHA256:1ae099aa07ffaa06a798a039c0117defa4d8f362ab467becae4ddcd384652dd9

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33391
Version 3.0.0.4.388_33391
37.96 MB
2024/05/02

Bug Fixes and Enhancements:
- Enhanced AiMesh Stability
- Fixed an issue where the RE product ID was not being updated in the AiMesh topology.
- Added DS-Lite Support.
- Corrected a display issue in the OpenVPN server that prevented IPv6 settings from showing correctly.
- Fixed a persistent GUI issue on 'Let's Encrypt Authorization' that displayed 'Authorization' incorrectly.
- Resolved a bug that prevented offline devices from being deleted in the Router App.
- Fixed an issue where the system would reboot due to parental control rules with empty enable fields.

Security updates:
- Addressed CVE-2023-48795 by updating the dropbear SSH server.
- Applied patches for CVE-2023-5678 & CVE-2024-0727
- Improved security in OpenVPN custom configuration.

Please unzip the firmware file, and then verify the checksum.
SHA256: adc347d7b53da23f1a71f857af69dbb071ca36b608dbbce14440b635beddac64

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ASUS RT-AX59U Firmware version 3.0.0.4.388_33147
Version 3.0.0.4.388_33147
37.79 MB
2024/03/14

Bug fixes and functionality modifications:
1. Resolved IPTV interruptions during extended use.
2. Addressed Guest Network performance issues with active IPTV.
3. Fixed potential Aura RGB crash.
4. Added eXtra Long Range support for enhanced connectivity.
5. Rectified potential IPV6-related crashes.
6. Improved roaming efficiency for AiMesh nodes under weak signals.
7. Addressed router crashes during WireGuard setup.
8. Fixed abnormal activation status in the Gear Accelerator function UI

Please unzip the firmware file, and then verify the checksum.
SHA256: ba3c8069f1e5747fd9ea984c96926763265f36f26a49af1a8362d1d5676d6752

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ASUS RT-AX59U Firmware version 3.0.0.4.388_32702
Version 3.0.0.4.388_32702
37.26 MB
2023/10/27

1. Fixed vpn client related issues.
2. Improve system stability.

Please unzip the firmware file, and then verify the checksum.
SHA256: d161da4f151e84663f5fe692a2dd6ad520ab98b232fe1d1a5b1cc77314266d17

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ASUS RT-AX59U Firmware version 3.0.0.4.388_32431
Version 3.0.0.4.388_32431
37.02 MB
2023/08/14

Security:
Fixed command injection vulnerabilities
Fixed remove ookla-IPQ956X
Fixed vulnerability in command injection after authentication
Fixed XSS potentially via malformed hostname in DHCP request
Fixed Fixed Stored Cross Site Scriptin
Fixed XSS attack via EXT3 USB in foldername
Fixed ping '-c' parameter in administration Network Tools is validated only on client side

Feature:
Add OCN Support.
Fixed v6plus related issues.
Fixed AiMesh node under Ethernet backhaul issues.
Fixed GUI bugs while searching for AiMesh Node.
Fixed USB function related issues.

Please unzip the firmware file, and then verify the checksum.
SHA256: 9d0ca28d1f4d506939b99df7b205c7bcc8f333340583f747bdb4693d7e3586f4

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ASUS RT-AX59U Firmware version 3.0.0.4.388_32198
Version 3.0.0.4.388.32198
36.87 MB
2023/06/20

1. Imporve system stability.
2. Fix speed issue under QoS.
3. Add Time machine.
4. Fix GUI issues.

Please unzip the firmware file, and then verify the checksum.
SHA256: 6582dbcf307569936088c26e45e56a8102ff7bc4b8d4b30b01bed3ff16958ce0

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ASUS RT-AX59U Firmware version 3.0.0.4.388.31948
Version 3.0.0.4.388.31948
36.63 MB
2023/04/26

- Fixed AiMesh related issues.
- Fixed wireless setting related issues.
- Fixed minor GUI issues.
- Supports smart connect.
- Supports more USB functions.
- Supports iPhone tether.

Please unzip the firmware file first then check the MD5 code.
MD5: 1e2e9d190f01aeab93820ae6c8a6ccdc

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ASUS RT-AX59U Firmware version 3.0.0.4.388.31345
Version 3.0.0.4.388.31345
30.98 MB
2023/01/06

Initial release

Please unzip the firmware file first then check the MD5 code.
MD5: 068e3299be04c8c45c276d6fcdeea903

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  • Products certified by the Federal Communications Commission and Industry Canada will be distributed in the United States and Canada. Please visit the ASUS USA and ASUS Canada websites for information about locally available products.
  • All specifications are subject to change without notice. Please check with your supplier for exact offers. Products may not be available in all markets.
  • Specifications and features vary by model, and all images are illustrative. Please refer to specification pages for full details.
  • PCB color and bundled software versions are subject to change without notice.
  • Brand and product names mentioned are trademarks of their respective companies.
  • The terms HDMI and HDMI High-Definition Multimedia Interface, HDMI trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.
    • The actual transfer speed of USB 3.0, 3.1, 3.2, and/or Type-C will vary depending on many factors including the processing speed of the host device, file attributes and other factors related to system configuration and your operating environment.
    • Actual data throughput and WiFi coverage will vary from network conditions and environmental factors, including the volume of network traffic, building material and construction, and network overhead, result in lower actual data throughput and wireless coverage.
    • Quoted network speeds and bandwidth based on current IEEE 802.11ac/802.11ax specifications. Actual performance may be affected by network and service provider factors, interface type, and other conditions. Connected devices must be 802.11ac/802.11ax compatible for best results.
    • WPA/WPA2 enterprise is only available on single router, is not available under AiMesh mode.
    • When traditional QoS is enabled, there will be limitations due to the actual Internet service bandwidth and different environment, and there may be a risk of speed reduction.
    • Due to the different power supply requirements on USB external hard disk and 4G/5G Modem device, to ensure that the external device can be used stably, if the USB external device exceeds the standard USB 2.0 (5V/500mA) and USB 3.1 Gen 1 (5V/900mA) power supply requirements, you need to use it with an independent external power supply.
    • If you use the product in conjunction with a third party service, you are responsible for complying with the third party provider's terms and conditions and privacy policy and are also at the risk of such use. ASUS does not provide support or guarantee continuous integration support for products that are not part of ASUS.
    • For models with Time machine support, starting with macOS 26 (Tahoe), Time Machine no longer supports creating new backups on USB-connected storage devices. Existing Time Machine drives that were previously configured remain compatible and can continue to be used for backup and restoration.