CVE-2018-7791

A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.

• CWE-287
• CWE-284

• http://www.securityfocus.com/bid/105182Third Party Advisory, VDB Entry
• https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/Mitigation, Vendor Advisory
• http://www.securityfocus.com/bid/105182Third Party Advisory, VDB Entry
• https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/Mitigation, Vendor Advisory

Published

Aug 29, 2018

Last Modified

Jun 17, 2026

Status

Modified

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