CVE-2018-7851

MEDIUM

6.5

CVSS Score

Published: May 22, 2019 at 07:56 PM UTC

Updated: June 17, 2026 at 02:03 AM UTC

45 products affected across 1 vendorModicon Premium FirmwareM580 FirmwareM340 Firmware

Using 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 by N/A?

Get instant alerts when new vulnerabilities affect 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 - before attackers find them.

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Severity

MEDIUM6.5

Exploit prediction

EPSS 1%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

140CRA312XXX Firmware · Schneider Electric

95%

All versions

schneider-electric-140cra312xxx (same device)

Bmx /e Cra Firmware · Schneider Electric

95%

v < 2.40

Affected range stops below 2.40, so it looks safe — our inference, not a vendor statement

schneider-electric-bmxcra31200 (environment) · schneider-electric-bmxcra31210c (environment)

M340 Firmware · Schneider Electric

95%

v < 3.01

Affected range stops below 3.01, so it looks safe — our inference, not a vendor statement

schneider-electric-modicon-m340-bmxp341000 (environment) · schneider-electric-modicon-m340-bmxp341000h (environment) · schneider-electric-modicon-m340-bmxp342000 (environment) · schneider-electric-modicon-m340-bmxp3420102 (environment) · schneider-electric-modicon-m340-bmxp3420102cl (environment) · schneider-electric-modicon-m340-bmxp342020 (environment) · schneider-electric-modicon-m340-bmxp342020h (environment) · schneider-electric-modicon-m340-bmxp3420302 (environment) · schneider-electric-modicon-m340-bmxp3420302cl (environment) · schneider-electric-modicon-m340-bmxp3420302h (environment)

M580 Firmware · Schneider Electric

95%

v < 2.50

Affected range stops below 2.50, so it looks safe — our inference, not a vendor statement

schneider-electric-bmeh582040 (environment) · schneider-electric-bmeh582040c (environment) · schneider-electric-bmeh584040 (environment) · schneider-electric-bmeh584040c (environment) · schneider-electric-bmeh586040 (environment) · schneider-electric-bmeh586040c (environment) · schneider-electric-modicon-m580-bmep581020 (environment) · schneider-electric-modicon-m580-bmep581020h (environment) · schneider-electric-modicon-m580-bmep582020 (environment) · schneider-electric-modicon-m580-bmep582020h (environment) · schneider-electric-modicon-m580-bmep582040 (environment) · schneider-electric-modicon-m580-bmep582040h (environment) · schneider-electric-modicon-m580-bmep582040s (environment) · schneider-electric-modicon-m580-bmep583020 (environment) · schneider-electric-modicon-m580-bmep583040 (environment) · schneider-electric-modicon-m580-bmep584020 (environment) · schneider-electric-modicon-m580-bmep584040 (environment) · schneider-electric-modicon-m580-bmep584040s (environment) · schneider-electric-modicon-m580-bmep585040 (environment) · schneider-electric-modicon-m580-bmep585040c (environment) · schneider-electric-modicon-m580-bmep586040 (environment) · schneider-electric-modicon-m580-bmep586040c (environment)

Modicon Premium Firmware · Schneider Electric

95%

All versions

schneider-electric-modicon-premium (same device)

Modicon 140CRA · Schneider Electric

60%

All versions

Modicon Bmxcra · Schneider Electric

60%

All versions

Modicon M340 · Schneider Electric

60%