CVE-2020-6990

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Summary

CVECVE-2020-6990
StatePUBLISHED
Assignericscert
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-03-16 16:15:14 UTC
Updated2026-06-03 14:16:23 UTC
DescriptionRockwell 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.001460000 probability, percentile 0.346470000 (date 2026-06-03)

Problem Types: CWE-321 | CWE-798 | CWE-321 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary10AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:L/Au:N/C:C/I:C/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Rockwellautomation Micrologix 1100 - All All All
Operating System Rockwellautomation Micrologix 1100 Firmware All All All All
Hardware Rockwellautomation Micrologix 1400 - All All All
Operating System Rockwellautomation Micrologix 1400 A Firmware All All All All
Operating System Rockwellautomation Micrologix 1400 B Firmware All All All All
Application Rockwellautomation Rslogix 500 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na 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 affected 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 Not specified

References

ReferenceSourceLinkTags
Rockwell Automation MicroLogix Controllers and RSLogix 500 Software | CISA af854a3a-2127-422b-91ae-364da2661108 www.us-cert.gov Third Party Advisory, US Government Resource
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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