CVE-2019-6820

Name: CVE-2019-6820
Creator: NVD / NIST
Published: 2019-05-22T20:29:02.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 1.24%

Last modified Jun 17, 2026

CVE-2019-6820 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. A CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device IP configuration (IP address, network mask and gateway IP address) when a specific Ethernet frame is received in all versions of: Modicon M100, Modicon M200, Modicon M221, ATV IMC drive controller, Modicon M241, Modicon M251, Modicon M258, Modicon LMC058, Modicon LMC078, PacDrive Eco ,PacDrive Pro, PacDrive Pro2. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

Description

A CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device IP configuration (IP address, network mask and gateway IP address) when a specific Ethernet frame is received in all versions of: Modicon M100, Modicon M200, Modicon M221, ATV IMC drive controller, Modicon M241, Modicon M251, Modicon M258, Modicon LMC058, Modicon LMC078, PacDrive Eco ,PacDrive Pro, PacDrive Pro2

Metrics

CVSS 3.1

8.2/10

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

EPSS Probability

1.24%

65.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicon M100 Firmware	All versions
Schneider-Electric	Modicon M200 Firmware	All versions
Schneider-Electric	Modicon M221 Firmware	All versions
Schneider-Electric	Atv Imc Drive Controller Firmware	All versions
Schneider-Electric	Modicon M241 Firmware	All versions
Schneider-Electric	Modicon M251 Firmware	All versions
Schneider-Electric	Modicon M258 Firmware	All versions
Schneider-Electric	Modicon Lmc058 Firmware	All versions
Schneider-Electric	Modicon Lmc078 Firmware	All versions
Schneider-Electric	Pacdrive Eco Firmware	All versions
Schneider-Electric	Pacdrive Pro Firmware	All versions
Schneider-Electric	Pacdrive Pro2 Firmware	All versions

References

https://www.schneider-electric.com/en/download/document/SEVD-2019-134-02/Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-02/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2019-6820?

How severe is CVE-2019-6820?

CVE-2019-6820 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6820?

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-2019-6820?

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

Scan your code now

Source: NVD / NIST