Hitachi TP1/LiNK 05-00 through 05-03-/F, 03-04 through 03-06-/K, and 03-00 through 03-03-/H; and TP1/Server Base 05-00 through 05-00-/M, 03-01-E through 03-01-FD, 03-01 through 03-01-DB, and 05-03; allow attackers to cause a denial of service (process crash) via invalid data to an OpenTP1 port.