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Vulnerability record · CVE-2020-7542 · published 11 December 2020

CVE-2020-7542: Schneider-electric modicon m580 bmep584040 firmware vulnerability

Schneider Electric · Modicon M580 Bmep584040 Firmware

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.

7.5 CVSS 3.1 High EPSS 1.3% · top 29.5% CWE-754 · CWE-754
7.5CVSS 3.1 base score, v2 5.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.

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

Affected products

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

References

LinkTags
https://www.se.com/ww/en/download/document/SEVD-2020-343-08/ Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-343-08/ Vendor Advisory

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Related vulnerabilities

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

9.8CVE-2022-45789Schneider-electric ecostruxure control expert authentication bypass by capture-replay vulnerabilityA CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause execution of unauthorized Modbus functions on the controller…EPSS 1.5%9.8CVE-2022-45788Schneider-electric ecostruxure control expert vulnerabilityA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause arbitrary code execution, denial of service and…EPSS 1.2%9.8CVE-2022-37300Schneider-electric ecostruxure control expert weak password recovery vulnerabilityA CWE-640: Weak Password Recovery Mechanism for Forgotten Password vulnerability exists that could cause unauthorized access in read and write mode t…EPSS 0.77%9.8CVE-2020-7540Schneider-electric modicon m340 bmxp341000 firmware missing authentication for critical function vulnerabilityA CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Mod…EPSS 2.3%9.8CVE-2020-7533Schneider-electric modicon m340 bmxp3420302 firmware improper authentication vulnerabilityCWE-287: Improper Authentication vulnerability exists which could cause the execution of commands on the webserver without authentication when sendin…EPSS 2.3%9.8CVE-2018-7241Schneider-electric bmxnor0200 firmware hard-coded credentials vulnerabilityHard coded accounts exist in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions of the c…EPSS 3.7%9.8CVE-2018-7760Schneider-electric bmxnor0200 firmware improper authentication vulnerabilityAn authorization bypass vulnerability exists in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200. Requests to CGI …EPSS 1.5%9.8CVE-2018-7242Schneider-electric bmxnor0200 firmware inadequate encryption strength vulnerabilityVulnerable hash algorithms exists in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions …EPSS 1.9%

Source: NIST National Vulnerability Database (record CVE-2020-7542), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.