Availability. The third portion of the cyber security triad. Confidentiality, integrity, availability.
If you cannot get to your stuff, or you stuff is harder to get to, then there has been a form of compromise in your service. Is it sexy like wannacry or technically advanced? No. But like most things IT, most of the time it is not.
As stated, technically correct. But availability of a relatively non-critical service being compromised is an entirely different story than integrity of their software being compromised. One is a no-op, the other is a potential all-hands-on-deck situation for anyone using the software.
The headline allows for both possibilities. See the example I posted in a sibling post: A headline of "terrorists strike railway station" would make most people imagine a bloodbath with dozens dead, while still being accurate if all that happened was that some ecoanarchists set a trash can on fire and forced an evacuation.
If you cannot get to your stuff, or you stuff is harder to get to, then there has been a form of compromise in your service. Is it sexy like wannacry or technically advanced? No. But like most things IT, most of the time it is not.