I can only really speak to Unifi... so...
In shorts 🩳
If you're a client of mine your either not affected or are patched 👍
Otherwise 👎 - If you run your own Unifi Network Controller (java) you need to update even if you don't expose the Web UI or behind a proxy, you will still be vulnerable 🙄 sigh yes you are, update. - explanations skipped (TM)
🔐 If you have Unifi Devices managed by a 3rd parties controller, i.e. Just access point's then there are a few mitigation checks you need to follow. Then your golden.
🔐 Access points themselves aren't affected however, because the network controller application can open a remote console on devices - this does pose a security 🗡 risk 😨🤯 to you.
🔐 If you don't know, not sure, or have unsupported equipment you can always unplug.
📅 This is a nasty zero day, hitting all sorts but if we all patch were great.
Cyber Security isn't a joke - If you need help, send me a message, or give me a call or carrier pigeon whatever works for you.