Cleartext Storage of Sensitive Information vulnerability in Mitsubishi Electric MELSEC iQ-F series FX5U(C) CPU all versions and Mitsubishi Electric MELSEC iQ-F series FX5UJ CPU all versions allows a remote unauthenticated attacker to disclose a file in a legitimate user's product by using previously eavesdropped cleartext information and to counterfeit a legitimate user's system.