Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in I-O DATA network attached hard disk 'HDL-T Series' firmware Ver.1.21 and earlier when 'Remote Link3 function' is enabled. If exploited, a remote unauthenticated attacker may execute an arbitrary OS command.
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.