CVE-2018-7851: Schneider Electric 140cra312xxx Firmware

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

CWE-119: Buffer errors vulnerability exists in Modicon M580 with firmware prior to V2.50, Modicon M340 with firmware prior to V3.01, BMxCRA312xx with firmware prior to V2.40, All firmware versions of Modicon Premium and 140CRA312xxx when sending a specially crafted Modbus packet, which could cause a denial of service to the device that would force a restart to restore availability.

Affected products

• Schneider Electric 140cra312xxx Firmware: any version
• Schneider Electric Bmx/e Cra Firmware: before 2.40 (fixed in 2.40)
• Schneider Electric m340 Firmware: before 3.01 (fixed in 3.01)
• Schneider Electric m580 Firmware: before 2.50 (fixed in 2.50)
• Schneider Electric Modicon Premium Firmware: any version

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