I could not log in to the RT-AX86U with my saved credentials, even after a reboot. After pressing the reset button, the router’s wireless functionality stopped working. I attempted a hard factory reset and used the Firmware Restoration tool, but the problem persists. Then a “country code error” also appears in the web GUI. I found out other posts mentioned the malware infections could corrupt or delete the manufacturing partition (mtd10), which has caused wireless functionality to fail and resulted in a "country code error."
I have received confirmation from ASUS that they are aware of this issue and have already implemented a fix. It has been confirmed that my Router cannot be repaired through a software upgrade. ASUS suggested that users contact customer service to request product repair services.