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Vulnerability record · CVE-2018-7846 · published 22 May 2019

CVE-2018-7846: Schneider-electric modicon m580 firmware exposure of resource to wrong sphere vulnerability

Schneider Electric · Modicon M580 Firmware

A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauthorized access by conducting a brute force attack on Modbus protocol to the controller.

9.8 CVSS 3.1 Critical EPSS 30% · top 1.9% CWE-668 · Exposure of resource to wrong sphere
9.8CVSS 3.1 base score, v2 5.0
30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauthorized access by conducting a brute force attack on Modbus protocol to the controller.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/ Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735 ExploitThird Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/ Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-7846), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.