Improper access control vulnerability in SkyBridge MB-A200 firmware Ver. 01.00.05 and earlier allows a remote unauthenticated attacker to connect to the product's ADB port.
https://www.seiko-sol.co.jp/products/skyspider/skyspider_download/mb-r210/
https://www.seiko-sol.co.jp/products/skybridge/skybridge_download/mb-a200/
https://www.seiko-sol.co.jp/products/skybridge/skybridge_download/mb-a130/
https://www.seiko-sol.co.jp/products/skybridge/skybridge_download/mb-a100/