Canon EOS 6D Mark II Wi-Fi Wireless Communication Function Instruction Manual - Page 155

Security If security settings have not been properly set, the following problems may occur.  Transmission monitoring Third parties with malicious intent may monitor the Wi-Fi transmissions and attempt to acquire the data you are sending.  Unauthorized network access Third parties with malicious intent may gain unauthorized access to the network you are using to steal, modify, or destroy information. Additionally, you could fall victim to other types of unauthorized access such as impersonation (where someone assumes an identity to gain access to unauthorized information) or springboard attacks (where someone gains unauthorized access to your network as a springboard to cover their tracks when infiltrating other systems). It is recommended to make use of the systems and functions to thoroughly secure your network, preventing these types of problems from occurring. 155