Siemens S7-200 SMART Go to product viewer dialog for this item. Password Unlock: Comprehensive Solutions To effectively address a locked Siemens S7-200 SMART PLC

Siemens acknowledged the issue (though not publicly as a CVE) and introduced countermeasures starting (released around late 2018). Subsequent versions V2.5, V2.6, and V2.8 have progressively hardened the mechanism.