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CVE-2020-6990

Published: Mar 16, 2020Updated: Jun 3, 2026 Sources: CVE List NVD BDU csafCWE-321
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
4.2%
Top 10.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-321CWE-798

Affected Products

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 priorn/a
micrologix 1400 a firmwarerockwellautomationICS / OT / IoT
micrologix 1400 b firmwarerockwellautomationICS / OT / IoT
micrologix 1100 firmwarerockwellautomationICS / OT / IoT
rslogix 500rockwellautomationICS / OT / IoT
rockwellautomationcommercialUSICS / OT / IoTaka rockwell automation
and 4 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

MITRE ATT&CK

2 techniques
Credential Access
Initial Access
View detailed technique mapping

References

https://www.us-cert.gov/ics/advisories/icsa-20-070-06
us-cert.gov
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2020/icsa-20-070-06.json
raw.githubusercontent.com
https://www.cisa.gov/news-events/ics-advisories/icsa-20-070-06
cisa.gov
and 12 more references View all →

Timeline

Published
Mar 16, 2020
Last Updated
Jun 3, 2026

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