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Vulnerability record · CVE-2019-6841 · published 29 October 2019

CVE-2019-6841: Schneider-electric modicon m580 firmware vulnerability

Schneider Electric · Modicon M580 Firmware

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with no firmware image inside the package using FTP protocol.

4.9 CVSS 3.1 Medium EPSS 24% · top 2.2% CWE-755 · CWE-755
4.9CVSS 3.1 base score, v2 4.0
24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with no firmware image inside the package using FTP protocol.

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

Affected products

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

References

LinkTags
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ Vendor 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%9.8CVE-2018-7847Schneider-electric modicon m580 firmware improper authentication vulnerabilityA CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which…EPSS 3.8%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%7.5CVE-2019-6856Schneider-electric modicon m580 firmware vulnerabilityA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium …EPSS 1.6%

Source: NIST National Vulnerability Database (record CVE-2019-6841), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.