CVE-2018-7241
Hard coded accounts exist in Schneider Electric’s Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions of the communication modules.
Date published : 2018-04-18
http://www.securityfocus.com/bid/103542
https://www.schneider-electric.com/en/download/document/SEVD-2018-081-01/