CVE-2020-28212
A CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists in PLC...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-28212- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-307
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-28212- Weakness
- CWE-307
- Updated
- 2026-11-02
EUVDEUVD-2020-20696 No score
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.
- Record
EUVD-2020-20696- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6pcj-rq2g-gx86 No score
A CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists in PLC...
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.
- Record
GHSA-6pcj-rq2g-gx86- Weakness
- CWE-307
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28212 is a critical vulnerability (CVSS 9.8) in Schneider-electric Ecostruxure Control Expert, published November 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.76%, the 86th percentile. No source names a fixed version.