ASUS ZenWiFi ET9
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BIOS & FIRMWARE

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  • BIOS & FIRMWARE

Firmware
ASUS ZenWiFi ET9 Firmware version 3.0.0.4.388_25306
Version 3.0.0.4.388_25306
50.52 MB
2026/05/22
SHA-256 :9E7BADCF1F238A8F8765C2DB5DEFB12FA710993AE6F1BAAF792E251B23ABB810

Security Fixes
Enhanced DNS Handling: Improved DNS name processing to address potential memory issues that could occur in rare cases during name format conversion, enhancing system security and robustness.
Strengthened Execution Module Safeguards: Improved protections for system execution modules to reduce the risk of unauthorized substitution during specific processes.

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ASUS ZenWiFi ET9 Firmware version 3.0.0.4.388_25265
Version 3.0.0.4.388_25265
50.31 MB
2025/10/29
SHA-256 :9D9ACF41F4D5F8F0F3303E4CFBB71F9A0D42837FEFD86F6FA5163463D8DC3DF5

- Enhanced system stability.
- Enhanced input validation and refactored legacy string handling routines to ensure robust memory management.
- Addressed multiple security weaknesses 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.
- 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 ZenWiFi ET9 Firmware version 3.0.0.4.388_25215
Version 3.0.0.4.388_25215
50.31 MB
2025/05/14
SHA-256 :11FF16756F5E0F2ABEA5EED16E232A909D56D0783849E7568D7A4FE0B2A4A2A5

- Improved compatibility with certain IoT devices.
- Optimized the app’s remote access capabilities for a smoother and more reliable connection.

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ASUS ZenWiFi ET9 Firmware version 3.0.0.4.388_25160
Version 3.0.0.4.388_25160
50.31 MB
2025/03/28
SHA-256 :52CF5A1A964CE241838317CD96214FC3FB4720443C2E734813867ECA07122ABB

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

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ASUS ZenWiFi ET9 Firmware version 3.0.0.4.388_25146
Version 3.0.0.4.388_25146
50.36 MB
2024/11/19

Please unzip the firmware file, and then verify the checksum.
SHA256: a320c60474fd3abde3edec255a4da8c73b5e9810a7c120c891f759b2b56b7d20

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.

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ASUS ZenWIFI ET9 Firmware version 3.0.0.4.388_25136
Version 3.0.0.4.388_25136
50.29 MB
2024/10/23

1. Unauthorized access prevention and security enhancements.
2. Prevent potential commad attacks in OpenVPN
3. XSS attack prevention enhancements.
4. AiMesh stability enhancement.
5. Resolved WireGuard connection issue when changing server IP.
6. Resolved IPv6 connection issue in VPN Fusion.
7. System stability improvements.

Please unzip the firmware file, and then verify the checksum.
SHA256: 3f24bf1859086e3af88e1c3232ccfc02418673aa683f7daa348040613664ed1f

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ASUS ZenWiFi ET9 Firmware version 3.0.0.4.388_24829
Version 3.0.0.4.388_24829
49.75 MB
2024/09/25

1. Optimized memory management mechanisms, improving system efficiency and stability.
2. Strengthened input validation and data processing workflows, further protecting your information security.
3. Improved web rendering engine, enhancing browsing experience and security.
4. Enhanced security of system command processing to guard against potential malicious operations.
5. Perfected JavaScript-related security mechanisms, offering a more secure web interaction environment.

Please unzip the firmware file, and then verify the checksum.
SHA256: 144204ac919ac33bb715327af9f0df836425a2732cbca02db3d779d41e0300c5

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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 specifications. Actual performance may be affected by network and service provider factors, interface type, and other conditions. Connected devices must be 802.11ac-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.
    • The device is restricted to indoor use only when operating in the 5150-5350 MHz frequency band in certain regions, including the EU, Asia-Pacific countries, Australia, and Canada. Outdoor use in this band may be prohibited or require regulatory approval. Check local regulations before deployment.
    • 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.