How are your cameras exposed, e.g, how did you get hacked? P2P? Port forwarding? Infected device on the LAN?
I am going to offer my potentially controversial opinion: whilst I am all for upgrading firmwares to patch vulnerabilities, my approach is basically to
always treat IP cams and NVRs as low-security (ironic I know, I mean in terms of network security) devices, which
will be hacked if sufficiently exposed.
E.G, I would never be happy exposing an IP camera that I care about via a port forward, even with the latest and greatest firmware. I also am mostly not comfortable using manufacturer P2P solutions, although these can often be a step better than a wide open port forward.
So, I simply isolate the cameras from the internet, VLAN, decent firewall, all the usual stuff you can find here:
How to Secure Your Network (Don't Get Hacked!)
Then, I don't even have to worry about whether the firmware is bulletproof or not - I might upgrade for a new feature (if I need it), otherwise I have no need.
I don't know if that makes sense or helps. In a nutshell, perhaps focus on isolating the cameras, instead of patching the cameras themselves?
