CVE-2020-6990
9.8
CRITICAL · CVSS 3.1 · EPSS 4.4% (pctl 91)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.37% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-321 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-03-16 |
| Last modified | 2026-06-17 |
Affected (6)
| Vendor | Product |
|---|---|
| rockwellautomation | micrologix 1100 |
| rockwellautomation | micrologix 1100 firmware |
| rockwellautomation | micrologix 1400 |
| rockwellautomation | micrologix 1400 a firmware |
| rockwellautomation | micrologix 1400 b firmware |
| rockwellautomation | rslogix 500 |
References
→ the Explorer · watch your stack · NVD