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.
worse still - Ubnt support told me when I asked how exactly I'm supposed to upgrade with no apt repo that Unifi Network is legacy and that I need to upgrade to Unifi OS
https://help.ui.com/hc/en-us/articles/34210126298775-Self-Hosting-UniFi
Self-Hosting UniFi
The UniFi OS Server is the new standard for self-hosting UniFi, replacing the legacy UniFi Network Server. While the Network Server provided basic hosting functionality, it lacked support for key U...
Ubiquiti Help Center@wesgeorge
Somewhere i have a box of unifi gear that got lost in a move. I've since switched to TP-Link Omada and I'm pretty happy with it. Ubiquiti products may still be good, but i won't be going back.