I am running an ASUS RT-AX55 V2. This Ars Technica article is one of many that detail compromised ASUS routers. Didn't ASUS used to have a very good reputation? Now I have to start looking into whether or not my device is compromised.
As one comment probably rightly says: Which means that the "Block Outsider Intrusion into LAN" list in uBO would protect you against such exploits.