People really pay too little attention to this attack avenue.
It's both extremely convenient and very unlikely to be detected; especially given that most current systems are associated to an account.
I'd be surprised if it's not widely used by law enforcement, when it's not possible to hack a device in more obvious ways.
Please check theupdateframework.io if you have a say in an update system.
Isn't it the same with many Linux distros?
Updates are using root to run?