Is CVE-2020-28212 actively exploited?

No active exploitation of CVE-2020-28212 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-28212 be exploited remotely?

Yes. CVE-2020-28212 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-28212?

CVE-2020-28212 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-28212

CRITICAL

CVE-2020-28212

CWE-307Published: November 19, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2020-28212 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.