What is the security risk with this web management interface configuration?

$192\mathrm{.}168\mathrm{.}1\mathrm{.}10/24$

Question $3$ options:

The $/24$ subnet is open to the entire network, exposing the potential for malicious computers to connect to the management interface.

The $/24$ subnet is not open to the entire network, exposing the potential for malicious computers to connect to the management interface.

The $/24$ subnet is exposing the firewall to the potential for malicious computers to connect to the management interface.

This does not pose a problem for the network