Beside Android, iOS, Amazon Kindle, and Windows 10, according to their website these are the devices, that can access CBS All Access:
Apple TV
Roku
Chromecast
Android TV
Fire TV
Xbox 360
Xbox One
You may want to ask them directly on why they don't support have the app available on Samsung assuming you are referring to Samsung TVs specifically. Here is the customer service form:
https://cbsi.secure.force.com/CBSi/submitcase_allaccess?template=template_cbsvod&referer=cbs.com/vod&categories=CBS_Entertainment:All_Access&cfs=SFS_FT&data=
I hope this helps!
I cant find it.

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