CVE-2026-3869: Schneider Electric Modicon m580

Critical severity, CVSS 9.2. EPSS: 0.5% chance of exploitation in the next 30 days.

CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.

Affected products

Published 2026-09-11. Last modified 2026-09-18.