CVE-2019-6809

Name: CVE-2019-6809
Creator: NVD / NIST
Published: 2019-09-17T20:15:11.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.76%

Last modified Jun 17, 2026

CVE-2019-6809 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A CWE-248: Uncaught Exception vulnerability exists in Modicon M580 (firmware versions prior to V2.90), Modicon M340 (firmware versions prior to V3.10), Modicon Premium (all versions), Modicon Quantum (all versions), which could cause a possible denial of service when reading invalid data from the controller.. EPSS estimates a 1.76% chance of exploitation in the next 30 days.

Description

A CWE-248: Uncaught Exception vulnerability exists in Modicon M580 (firmware versions prior to V2.90), Modicon M340 (firmware versions prior to V3.10), Modicon Premium (all versions), Modicon Quantum (all versions), which could cause a possible denial of service when reading invalid data from the controller.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.76%

75.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicon M580 Firmware	< 2.90
Schneider-Electric	Modicon M340 Firmware	< 3.10
Schneider-Electric	Modicon Premium Firmware	All versions
Schneider-Electric	Modicon Quantum Firmware	All versions

References

https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory

Timeline

Published: Sep 17, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-6809?

How severe is CVE-2019-6809?

CVE-2019-6809 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6809?

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-2019-6809?

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

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Source: NVD / NIST