[Known Issue] [8.5.3] USB WAN Config Missing After Reboot

WeiMing · October 16, 2025, 9:13am

Ref.: #35032

Details:
We have received several reports from users experiencing issues with their devices’ USB WAN, which is no longer able to connect after updating to firmware version 8.5.3 GA.

Upon investigation and verification using a lab device, we noticed that the USB WAN configuration is restored after upgrading to firmware version 8.5.3 GA.

In addition, any changes made to the USB WAN after upgrading to version 8.5.3 GA will no longer persist after a reboot.

We have prepared a special firmware (8.5.3s042) to mitigate the issue. The fix will be included in the next GA release.

Affected firmware version:
8.5.3 GA

Affected models:
All device models that support USB WAN

Fixed in firmware version:
8.5.3s042

Download Link	Product	Hardware Revision
Download	B One Series	HW1/HW1-2
	MAX BR1 Pro CAT-20	HW7
	MAX BR1 Pro 5G	HW1
	MAX BR2 Pro	HW4
	MAX Dome Pro LR	HW1
	MAX HD1 Dome Pro	HW1-2
	MAX Transit Duo Pro	HW1
Download	Balance 2500 EC	HW1
	Balance 1350 EC	HW1
	Balance 310 5G	HW1-2
	Balance 310 Fiber 5G	HW1-2
	Balance 310X	HW1-4
	Balance 380X	HW1
	Balance 580X	HW1
	Balance Two	HW1
	EPX	HW1
	MAX HD2 MBX	HW1-4
	MAX HD4 MBX	HW1-4
	MAX MBX Mini	HW1
	PDX	HW1-2
	SDX	HW1-3
	SDX Pro	HW1-2
Download	Balance 20X	HW1-3
	MAX BR1 IP55	HW4
	UBR Plus	HW1
Download	Balance 210	HW4-5
	Balance 30 LTE	HW3
	Balance 30 Pro	HW1
	Balance 310	HW4
	Balance One	HW1-3
	Balance One Core	HW1
	MAX 700	HW3-4
	MAX BR1 ENT	HW1-2
	MAX HD1 Dome	HW1
	MAX HD2	HW5-6
	MAX HD2 Dome	HW1
	MAX HD2 IP67	HW2-5
	MAX HD2 Mini	HW1-4
	MAX HD2 with MediaFast	HW1-4
	MAX HD4	HW1-5
	MAX HD4 IP67	HW1
	MAX HD4 with MediaFast	HW1-4
	MAX Transit	HW1-3
	MAX Transit 5G	HW2-3
	MAX Transit Core	HW1
	MAX Transit Duo	HW1-3
	MAX Transit Duo Pro E	HW1
	MediaFast 200	HW1,3
	SpeedFusion Engine Cam	HW1
Download	Balance 1350	HW2
	Balance 2500	HW1
	Balance 305	HW2
	Balance 380	HW6
	Balance 580	HW2-3
	Balance 710	HW3
	MediaFast 500	HW1-2
	MediaFast 750	HW1
Download	MAX BR1 Mini	HW3
	MAX BR1 Mini 5G	HW1
	MAX BR1 Mini Core	HW3
	MAX BR1 Mini M2M	HW1
	MAX BR2 LTE	HW4
	MAX BR2 Micro	HW1

Workaround:
Optionally, you can downgrade to the previous firmware version, eg. 8.5.2 or earlier.

ChristopherSpitler · October 21, 2025, 8:50pm

Hey @WeiMing , I updated to this firmware on a BR2 Pro 5G that I have and was having issues with the 5G Max Adapter (the dongle). Now, it won’t connect to the device reliably, tells me “no peplink esim subscription” even though peplink eSIM is disabled for that interface, and also shows “no physical status” often. In short, it went from not working to really not working Any advice?

Zheng_Hong_Chan · October 22, 2025, 5:01am

Hi @ChristopherSpitler, we tried to reproduce this but failed. I am able to connect to SIM A without issue even performed a reboot on the router or the MAX adapter. Could you help open a ticket for us to further check and support you on this?

ChristopherSpitler · October 22, 2025, 12:18pm

Ticket 25100812 filed.

DaveZ · October 22, 2025, 12:51pm

Are these “s” releases cumulative? Or forks / hot fixes? In other words, does this include the beta iPhone USB tethering support? Thanks!

mldowling · October 23, 2025, 3:38am

Hello Everyone,
We have been working with the Peplink team, and there is another version (excluding the iPhone tethering) that we are testing; the results are looking promising. There should be an update from the Peplink team posted on this soon.
Have a good week,
Marcus

sitloongs · October 24, 2025, 7:31am

In general, special firmware versions are not cumulative unless stated otherwise in the description provided above. The special firmware will mainly targeted for those specially using the feature which required a fix before it been cumulative in the next GA version.

For cases that are more complex and may involve multiple issues requiring a combination of fixes, please create a support ticket so that our team can review and provide further assistance.

bryn.loftus · November 4, 2025, 6:12am

Does this USB-WAN issue affect wan2 on the B One 5g?

chris_heard · November 9, 2025, 6:11pm

The new dedicated firmware 8.5.3 for Balance One Core, 8.5.3s042-build5789 deletes the USB WAN feature completely. Looking forward to a fix for this even though support for Balance One Core goes end of life after 8.5.3. For me this feature gets used all the time.

WeiMing · November 10, 2025, 4:53am

@chris_heard this is strange…

I have a quick setup with our lab unit (Balance One Core) with the special firmware, 8.5.3s042, I have no issue connecting a USB-Ethernet adapter, although it’s name as “Mobile Internet”…

Physical connectivity

Probably, you can submit a ticket for our team to take a closer look at the device?

Please include the device S/N and quote this forum in the ticket so that the team member who takes on the case is aware of the background.