This version of firmware is only applicable to RT-AX1800S V2, please check the model name from the product SN label or box label before utilizing.

Improve system stability.

We recommend upgrading to this version to maintain optimal protection.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

New Features
- New Time Zone Options: Added "Vancouver, Whitehorse (PST7)" and "Edmonton, Yellowknife (MST6)" time zone options for Canada.

Bug Fixes and Enhancements
- Strengthened firewall rule configuration for UPnP, improving port-forwarding stability and firewall rule restoration reliability.

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.
- Improved data-display handling in a web function to enhance browsing security.
- 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.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

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.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

Strengthened input sanitization mechanism.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

- 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.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

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 10 characters with at least 1 letter, 1 digit and 1 special symbol, and no 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.
- 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.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

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.

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.

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

Please unzip the firmware file, and then verify the checksum
SHA256: 852f1f571b3ea3fec99b1c7eab055d89763b7ec2c7e1ca4532df83289f727727

This version of firmware is only applicable to RT-AX1800S, please check the model name from the product SN label or box label before utilizing.


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.
SHA: bcd0c843df7f61d636bc5a6a998f416544187e9b23b4a8f1fff7d561700be2ee