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Vulnerability record · CVE-2019-6855 · published 6 January 2020

CVE-2019-6855: Schneider-electric ecostruxure control expert incorrect authorization vulnerability

Schneider Electric · Ecostruxure Control Expert

Incorrect Authorization vulnerability exists in EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20) , and Modicon M580 (all versions prior to V3.10), which could cause a bypass of the authentication process between EcoStruxure Control Expert and the M340 and M580 controllers.

7.3 CVSS 3.1 High EPSS 0.96% · top 40.1% CWE-863 · Incorrect authorization
7.3CVSS 3.1 base score, v2 7.5
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
23Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Incorrect Authorization vulnerability exists in EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20) , and Modicon M580 (all versions prior to V3.10), which could cause a bypass of the authentication process between EcoStruxure Control Expert and the M340 and M580 controllers.

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

Affected products

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

References

LinkTags
https://www.se.com/ww/en/download/document/SEVD-2019-344-02/ Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2019-344-02/ Vendor 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-2019-6855), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.