CVE-2019-6844

Name: CVE-2019-6844
Creator: NVD / NIST
Published: 2019-10-29T19:15:22.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 0.96%

Last modified Jun 17, 2026

CVE-2019-6844 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, Modicon M340, Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service atack on the PLC when upgrading the controller with a firmware package containing an invalid web server image using FTP protocol.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

Description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service atack on the PLC when upgrading the controller with a firmware package containing an invalid web server image 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

0.96%

57.0th 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-2019-6844?

How severe is CVE-2019-6844?

CVE-2019-6844 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6844?

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-2019-6844?

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

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Source: NVD / NIST