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Vulnerability record · CVE-2018-7847 · published 22 May 2019

CVE-2018-7847: Schneider-electric modicon m580 firmware improper authentication vulnerability

Schneider Electric · Modicon M580 Firmware

A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service or potential code execution by overwriting configuration settings of the controller over Modbus.

9.8 CVSS 3.1 Critical EPSS 3.8% · top 10.3% CWE-287 · Improper authentication
9.8CVSS 3.1 base score, v2 7.5
3.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service or potential code execution by overwriting configuration settings of the controller over Modbus.

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-2018-0742 ExploitThird Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0743 Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/ Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0742 ExploitThird Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0743 Third Party Advisory

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Related vulnerabilities

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

9.8CVE-2020-7475Schneider-electric ecostruxure control expert injection vulnerabilityA CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), reflective DLL, vulnerability exists in…EPSS 1.6%9.8CVE-2019-6808Schneider-electric modicon premium firmware missing authentication for critical function vulnerabilityA CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which…EPSS 8.2%9.8CVE-2018-7842Schneider-electric modicon m580 firmware authentication bypass by spoofing vulnerabilityA CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Pre…EPSS 35%9.8CVE-2018-7846Schneider-electric modicon m580 firmware exposure of resource to wrong sphere vulnerabilityA CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Q…EPSS 30%9.1CVE-2019-6815Schneider-electric modicon quantum firmware vulnerabilityIn Modicon Quantum all firmware versions, CWE-264: Permissions, Privileges, and Access Control vulnerabilities could cause a denial of service or una…EPSS 1.4%9.1CVE-2019-6816Schneider-electric modicon quantum firmware code injection vulnerabilityIn Modicon Quantum all firmware versions, a CWE-94: Code Injection vulnerability could cause an unauthorized firmware modification with possible Deni…EPSS 1.5%8.6CVE-2019-6848Schneider-electric modicon m580 firmware vulnerabilityA CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMEN…EPSS 33%7.5CVE-2023-25619Schneider-electric modicon m580 firmware vulnerabilityA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause denial of service of the controller when commun…EPSS 0.62%

Source: NIST National Vulnerability Database (record CVE-2018-7847), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.