CVE-2018-7853: Schneider Electric Modicon m340 Firmware

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service when reading invalid physical memory blocks in the controller over Modbus

Affected products

• Schneider Electric Modicon m340 Firmware: before 3.10 (fixed in 3.10)
• Schneider Electric Modicon m580 Firmware: before 2.90 (fixed in 2.90)
• Schneider Electric Modicon Premium Firmware: affected versions not specified
• Schneider Electric Modicon Quantum Firmware: affected versions not specified

Published 2019-05-22. Last modified 2026-06-17.