Which models? Right now it looks like Netgear R7000, R6400 and R8000 routers, but there may be more models that are vulnerable. Should you really take this seriously and unplug your router? You betcha, since US-CERT said it is “trivial” to exploit this vulnerability. Visit a booby-trapped page and whammo! An attacker would be saying hello to root privileges on your router.
My router was among these and I’ll be replacing it right away. Check yours. The R7000 is a model I’ve be recommending to a lot of people.