Answer:
Hackers can snoop on data sent over your network.
Hackers can use your network to access your computer's files and system information.
Explanation: Unsecured Wireless connections are wireless connections which are have no passwords they are open to the general public,such networks can be very risky to use as it gives easy access to dishonest persons who can manipulate that opportunity to SNOOP ON DATA SENT OVER YOUR NETWORKS. They can use this hacking to fraudulently steal from your bank account and obtain your private information.