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Vulnerability record · CVE-2019-6845 · published 29 October 2019

CVE-2019-6845: Schneider-electric modicon m580 firmware cleartext transmission vulnerability

Schneider Electric · Modicon M580 Firmware

A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions), which could cause the disclosure of information when transferring applications to the controller using Modbus TCP protocol.

7.5 CVSS 3.1 High EPSS 1.1% · top 36.0% CWE-319 · Cleartext transmission
7.5CVSS 3.1 base score, v2 5.0
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
23Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A CWE-319: Cleartext Transmission of Sensitive Information vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions), which could cause the disclosure of information when transferring applications to the controller using Modbus TCP protocol.

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

Affected products

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

References

LinkTags
https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-03 Vendor Advisory
https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-03 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-2018-7846Schneider-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-2018-7842Schneider-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-2018-7847Schneider-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 32%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-2019-6845), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.