CVE-2018-7842

Name: CVE-2018-7842
Creator: NVD / NIST
Published: 2019-05-22T20:29:01.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 35.04%

Last modified Jun 17, 2026

CVE-2018-7842 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause an elevation of privilege by conducting a brute force attack on Modbus parameters sent to the controller.. EPSS estimates a 35.04% chance of exploitation in the next 30 days.

Description

A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause an elevation of privilege by conducting a brute force attack on Modbus parameters sent to the controller.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

35.04%

98.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-290

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-2018-0741Exploit, Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0741Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2018-7842?

How severe is CVE-2018-7842?

CVE-2018-7842 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 35.04% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7842?

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-2018-7842?

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

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Source: NVD / NIST