The devices—used for CT scans, MRIs, X-Rays, mammograms, ultrasounds, and positron emission tomography—use a default password to receive regular maintenance. The passwords are available to anyone who knows where on the Internet to look. A lack of proper access restrictions allows the devices to connect to malicious servers rather than only those designated by GE Healthcare. Attackers can exploit these shortcomings by abusing the maintenance protocols to access the devices. From there, the attackers can execute malicious code or view or modify patient data stored on the device or the hospital or healthcare provider servers.

Aggravating matters, customers can’t fix the vulnerability themselves. Instead, they must request that the GE Healthcare support team change the credentials. Customers who don’t make such a request will continue to rely on the default password. Eventually, the device manufacturer will provide patches and additional information.

Source: GE puts default password in radiology devices, leaving healthcare networks exposed | Ars Technica