Vulnerability record · CVE-2020-28212 · published 19 November 2020

CVE-2020-28212: Schneider-electric ecostruxure control expert improper restriction of authentication attempts vulnerability

Schneider Electric · Ecostruxure Control Expert

A CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause unauthorized command execution when a brute force attack is done over Modbus.

9.8 CVSS 3.1 Critical EPSS 2.8% · top 14.3% CWE-307 · Improper restriction of authentication attempts

9.8CVSS 3.1 base score, v2 7.5

2.8%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

17 Jun 2026Last modified by NVD

Description

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

Affected products

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

Ecostruxure Control Expert Schneider Electric

References

Link	Tags
https://www.se.com/ww/en/download/document/SEVD-2020-315-07	PatchVendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-315-07	PatchVendor 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-2020-28212), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.