CCTV if connected to your WiFi needs some protection from simple attacks.
I would recommend some of the newer WiFi 6 routers that offer PMF like the Netgear RAX120 or if you have a greater understanding of Networking something along the lines a Ubiquiti Dream Machine that offers more security options but is a WiFi 5 based router. Both will offer WIFi protection but the Unfi UDM has a far better interface to see what’s going on.
you also need a router that is supported with up to date security patches again a WiFi 6 router will be supported longer than most domestic third party routers offering WiFi 5 as they move across. A recent example is the flaw in the WiFi standard that involves all devices and many routers and APs which has now been made public. It’s not a huge concern due to how the attack takes place but the better companies tend to patch quickly most of the time.
depending on your connection you may need a modem as well rather than messing with DMZ work around.
My advice is look at what your networking requirements are and then look for a router that offers what you are happy with ie. parental controls, malware protection, type of devices you use, coverage, eco system and so on.
