I read this article, and even read the more technically detailed report it linked to. I still don't know if this is an Asus software problem, or a hardware problem. My AX6000 has OpenWrt on it. Should I connect it to The Internet, will it be vulnerable to this attack?

I asked in the OpenWrt forum - OpenWrt does not store config info the same way that Asus-rt does. And it's not a hardware issue. This is down to old janky system software.