BYOD stands for Bring Your Own Device. This is standard for home and internet networks. That is, it has no standards.
Corporate networks, however, do run on standards. The risk associated with BYOD is they are:
not owned or controlled by the company
tend to access higher risk home and public wifi networks on the road
generally portable and can wander in and out of the corporate network.
It’s also important to remember that most devices are also recording devices and could compromise everything from a board room meeting to a by-the-cooler chat to taking a photo of a screen.
The BYOD cyber security risks to mitigate, therefore, are:
1) access to the corporate network,
2) information stored on the BYO devices,
3) information communicated via the device.