Is CVE-2020-6990 actively exploited?

No active exploitation of CVE-2020-6990 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-6990 be exploited remotely?

Yes. CVE-2020-6990 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-6990?

CVE-2020-6990 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-6990

CRITICAL

CVE-2020-6990

CWE-321Published: March 16, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, The cryptographic key utilized to help protect the account password is hard coded into the RSLogix 500 binary file. An attacker could identify cryptographic keys and use it for further cryptographic attacks that could ultimately lead to a remote attacker gaining unauthorized access to the controller.

NVD Source

Technical Analysis

CVE-2020-6990 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.