@ReadiesCards 

Update 19/11/2021:

We have contacted "Which" to discuss and assure that there is no security concern with the Archer AX90, while they'd mistakenly put the security notice on the page. That has been requested to be deleted now, you can confirm again:

https://www.which.co.uk/reviews/wi-fi-routers-and-extenders/tplink-archer-ax90-ax6600

Thank you for your interest and support of TP-Link products as always. Good day.

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Hello, thank you very much for asking in the community forum.

Archer AX90 has passed all the testing procedures and no security issues have been reported, and that can explain why you can purchase it in the local market/online. So no worries, the product is safe to use.

We attach great importance to security feedback and will immediately contact "Which" to discuss and confirm what they have found. If there are indeed unknown security issues, we will publish a security announcement in the security advisory of the TP-Link official website. If the issue does not exist, we will also request Which to issue a clarification and cancel the Security Notice on their website.  

@ReadiesCards 

Definitely sure. We will also update here once there is an update.