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This depends on how you connect it. If you connect to a network Windows gives you the option to decide what kind of network this is. If you choose that you are on a public network (which is usually the default) then the SMB services will not be exposed to the network. But if you chose private network instead they will.

Note that exposing this port to the Android phone does not necessarily mean that it is exposed to the internet. As korockinout13 correctly says in his answer the phone will do NAT which means that the port will not be directly reachable from outside. But, the port will still be reachable from the local network, i.e. from any other systems connected to the same hotspot. This means that if any of the systems connected to the hotspot is already infected the attack might spread from this system to your system.

This depends on how you connect it. If you connect to a network Windows gives you the option to decide what kind of network this is. If you choose that you are on a public network (which is usually the default) then the SMB services will not be exposed to the network. But if you chose private network instead they will.

This depends on how you connect it. If you connect to a network Windows gives you the option to decide what kind of network this is. If you choose that you are on a public network (which is usually the default) then the SMB services will not be exposed to the network. But if you chose private network instead they will.

Note that exposing this port to the Android phone does not necessarily mean that it is exposed to the internet. As korockinout13 correctly says in his answer the phone will do NAT which means that the port will not be directly reachable from outside. But, the port will still be reachable from the local network, i.e. from any other systems connected to the same hotspot. This means that if any of the systems connected to the hotspot is already infected the attack might spread from this system to your system.

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This depends on how you connect it. If you connect to a network Windows gives you the option to decide what kind of network this is. If you choose that you are on a public network (which is usually the default) then the SMB services will not be exposed to the network. But if you chose private network instead they will.