WiFi 6 AP reverts to previous firmware version

Zyxel_Bella Posts: 437  Zyxel Employee
First Anniversary 10 Comments Friend Collector First Answer

Affected WiFi Access point model: 

NWA110AX, NWA210AX, WAX510D, WAX610D and WAX650S


We regret to inform you that new firmware release on 27th September has potential risk to cause client failed to obtain the IP address. 

The symptom is when a WiFi client with WPA2-PSK/WAP2-Enterprise/WPA3-Enterprise will lost its IP address after roamed from 2.4Ghz to 5Ghz or vice versa on the same AP. 

We’ve identified this is a bug originated from chipset driver code. For clients with open security (unencrypted) are not affected. Client roaming between different access points DOES NOT have the same problem. 

Please arrange the soonest schedule to revert AP firmware to previous version for ensuring smooth WiFi experience. 

The issue only happens on following models NWA110AX, NWA210AX, WAX510D, WAX610D and WAX650S.


Following is guidance to downgrade the firmware on nebula control center.

Go to firmware management page.  Path: Site-wide > Configure > Firmware management

Step1: Select the affected one or multiple AP models.

Step2: Check the firmware version is v6.25.

Step3: Select the specific AP or all APs in the list.

Step4: Click Upgrade now button.

Step5: Check the current version has reverted to V6.20 after firmware updated.