Looks like that specific vulnerability was found this summer, disclosed in coordination with the vendor and at least some models were patched [0] (unclear if all models were), but from early reports:

- they either didn't warn their customers this was a critical security patch, - many of these fridges/freezers were directly accessible on the internet with their own 3G/4F SIM cards without further protection!

Crazy stuff

[0] https://www.claroty.com/team82/research/freeze-the-controlle...