CVE-2018-7851

Name: CVE-2018-7851
Creator: NVD / NIST
Published: 2019-05-22T20:29:01.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.19%

Last modified Jun 17, 2026

CVE-2018-7851 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.19%

64.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	M580 Firmware	< 2.50
Schneider-Electric	M340 Firmware	< 3.01
Schneider-Electric	Bmx\/E Cra Firmware	< 2.40
Schneider-Electric	Modicon Premium Firmware	All versions
Schneider-Electric	140cra312xxx Firmware	All versions

References

https://www.schneider-electric.com/en/download/document/SEVD-2019-134-10/Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-10/Vendor Advisory

Timeline

Published: May 22, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7851?

How severe is CVE-2018-7851?

CVE-2018-7851 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7851?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7851?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST