Canon is cautioning users of home, office, and large format inkjet printers that their devices’ Wi-Fi connection settings are not properly wiped during initialization, posing a security and privacy risk. This flaw could potentially allow unauthorized individuals, such as repair technicians, temporary users, or future buyers, to access sensitive Wi-Fi network details stored in the printer’s memory, including network SSID, password, network type, IP address, MAC address, and network profile.

Source: Heimdal Security Blog