CVE-2018-7849

Name: CVE-2018-7849
Creator: NVD / NIST
Published: 2019-05-22T20:29:01.777+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.29%

Last modified Jun 17, 2026

CVE-2018-7849 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause a possible Denial of Service due to improper data integrity check when sending files the controller over Modbus.. EPSS estimates a 3.29% chance of exploitation in the next 30 days.

Description

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause a possible Denial of Service due to improper data integrity check when sending files the controller over Modbus.

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

3.29%

86.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-755

Affected Software

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

References

https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0737Exploit, Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0737Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2018-7849?

How severe is CVE-2018-7849?

CVE-2018-7849 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.29% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7849?

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-2018-7849?

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

Scan your code now

Source: NVD / NIST