A secondhand Rapiscan 522 B X-ray system has several blatant security weaknesses that leave the equipment vulnerable to abuse. It runs on the outdated Windows 98 operating system, stores user credentials in plain text. It includes a feature called Threat Image Projection used to train screeners by injecting.bmp images of contraband, such as a gun or knife, into a passenger carry-on in order to test the screener’s reaction during training sessions. The researchers have reported the flaws to ICS-CERT.”]
Source: https://www.darkreading.com/attacks-breaches/tsa-carry-on-baggage-scanners-easy-to-hack