ASUS ZenWiFi XD4S / XD4 Plus Firmware version 3.0.0.4.386_69209 – 2026/03/05 ASUS ZenWiFi XD4S / XD4 Plus Firmware version 3.0.0.4.386_69209 2026/03/05 Improvements: Optimized Wi-Fi roaming stability for devices supporting 802.11k but not allowing 11v. Improved Wi-Fi roaming compatibility and stability...

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ASUS ZenWiFi XD4S / XD4 Plus Firmware version 3.0.0.4.386_69209

2026/03/05

 

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.
Improved system behavior when using System diagnostic on feedback page.

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.

https://www.asus.com/networking-iot-servers/whole-home-mesh-wifi-system/zenwifi-wifi-systems/asus-zenwifi-xd4s/helpdesk_bios?model2Name=ASUS-ZenWiFi-XD4S

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