@Altair8800 

To All That Stumble on This Thread.

TP-Link is now under FTC Investigation for Lack of Security on their devices. 

This explains why TP-Link refuses to add Secure DNS to their Deco Devices.. They have a backdoor they are using to perpitrate Cyber attacks using their Home Networking Equipment. 

I will be returning / Tossing ALL TP-Link products as this is a major security concern and the exact reason we ask for DoH / DoT.

  @NetworkHelper 
I will await a response from someone at TP Link to see how honest they are about this issue. Hopefully someone may come up with an aftermarket firmware patch to correct this as is the case with some other routers on the market if TP does not come clean.

  @Altair8800 

I think we all are wanting to know more about this issue. Is it something that could allow an attack using the router or is is it something that has been or currently under attack. 

This alert is much like the alert that was issued a few years ago on some of the camera systems. Some brands of cameras are no longer allowed to be used in most government places because of a possible breech. Many think that no camera system and most IoT devices that connects to network is safe no matter what router you use. Some use additional devices to control and block info on the network with devices that use products such as PFsense or OPNsense.

Based on what I have found on the internet, I do not think this issue is any way limited to TP Link.

I am playing with OPNsense to be used in bridge mode which will put more security between my modem and router.  I still have a lot to learn about it.  Before I was more worried about my IoT and other devices than my router. There have been a lot of news where things like TVs, cameras, and such calling home. 

  @ArcherC8 
Thanks for the response. You are right about other devices being hijacked for sure. I suspect much of the problem may be due to many users not changing the default login and password from admin. I still await the response from someone at TP Link who is actually concerned with this issue and is not partial to the whims of the culprits involved.