Samsung TVs are designed to ensure they're always running the latest version of software and apps. However, you can manually update the CBS app with these steps:

1. Start your TV, open the SmartHub, and go to Samsung Apps. 
2. Search for CBS under "My Apps". 
3. Once you have located the CBS app, press & hold the "Enter" button (located in the center of the directional pad in the middle of your remote control) until a dialog box pops up. 
4. Once the dialog box appears, select "Update Apps". 
5. Select the CBS app to begin updating. 
6. Once the update has completed, restart your TV.