CVE-2019-6841

Name: CVE-2019-6841
Creator: NVD / NIST
Published: 2019-10-29T19:15:21.83+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 24.37%

Last modified Jun 17, 2026

CVE-2019-6841 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with no firmware image inside the package using FTP protocol.. EPSS estimates a 24.37% chance of exploitation in the next 30 days.

Description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with no firmware image inside the package using FTP protocol.

Metrics

CVSS 3.1

4.9/10

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

EPSS Probability

24.37%

97.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicon M580 Firmware	All versions
Schneider-Electric	Modicon M340 Firmware	All versions
Schneider-Electric	Modicon Bmxcra Firmware	All versions
Schneider-Electric	Modicon 140cra Firmware	All versions

References

https://www.se.com/ww/en/download/document/SEVD-2019-281-02/Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/Vendor Advisory

Timeline

Published: Oct 29, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-6841?

How severe is CVE-2019-6841?

CVE-2019-6841 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 24.37% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6841?

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-2019-6841?

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

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Source: NVD / NIST