Diebold Nixdorf Vynamic Security Suite (VSS) before 3.3.0 SR12, 4.0.0 SR04, 4.1.0 SR02, and 4.2.0 SR01 fails to validate the directory structure of the root file system during the Pre-Boot Authorization (PBA) process. This can be exploited by a physical attacker who is able to manipulate the contents of the system's hard disk.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.