Affected: I-O DATA DEVICE, INC. HDL-TC1, I-O DATA DEVICE, INC. HDL-TC500, I-O DATA DEVICE, INC. HDL-T1NV, I-O DATA DEVICE, INC. HDL-T1WH, I-O DATA DEVICE, INC. HDL-T2NV, I-O DATA DEVICE, INC. HDL-T2WH, I-O DATA DEVICE, INC. HDL-T3NV, I-O DATA DEVICE, INC. HDL-T3WH

Missing authentication for critical function issue exists in I-O DATA network attached hard disk 'HDL-T Series' firmware Ver.1.21 and earlier. If exploited, a remote unauthenticated attacker may change the product settings.