I babysit 2 Unifi controllers. Started poking around to determine why neither of them show an update available despite being several revs below the one just released to address the CVE and it turns out that hxxps://www.ui.com/downloads/unifi/debian now redirects to something ... that is not an apt repository, nor a 404, so apt concludes (silently) that no updates are available. Ubnt dumping the repo is bad enough, but apt should tell me it didn't actually check the repo correctly.
@wesgeorge Thanks for the heads up, just checked mine and exactly the same state, no warnings, no complaints! I also hadn't realised it was no longer getting updates.
unifi-network-application - LinuxServer.io

The [Unifi-network-application](https://ui.com/) software is a powerful, enterprise wireless software engine ideal for high-density client deployments requiring low latency and high uptime performance.

@bencc @wesgeorge Although having just updated that and logged in I get the message β€œUpgrade to UniFi OS Server
UniFi Network Server will not support upcoming Network versions. Move to UniFi OS Server for a modern, supported platform with faster iteration and deeper platform capabilities.”
@jmb @wesgeorge boo. This is so frustrating.
@bencc @jmb @wesgeorge I'm going to have to waste some neurons on this imminently, too. I'm sure I bought the Unifi stuff because it was supposed to Just Work.