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CVE-2020-6988

Published: Mar 16, 2020Updated: Jun 3, 2026 Sources: CVE List NVD BDU csafCWE-603
NVD MITRE
7.5CVSSHIGH
EPSS Score
3.9%
Top 11.1%
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, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim’s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
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:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-603CWE-287

Affected Products

Allen Bradley MicroLogix 1400 Series ARockwell Automation Inc.ICS / OT / IoT
Allen Bradley MicroLogix 1100Rockwell Automation Inc.ICS / OT / IoT
RSLogix 500Rockwell Automation Inc.ICS / OT / IoT
Allen Bradley MicroLogix 1400 Series BRockwell Automation Inc.ICS / OT / IoT
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
rockwell automation inc.commercialUSICS / OT / IoTaka rockwell automation arena, thinmanager, guardlogix 5580
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
Initial Access
View detailed technique mapping

References

https://www.us-cert.gov/ics/advisories/icsa-20-070-06
us-cert.gov
https://www.cybersecurity-help.cz/vdb/SB2020031124
cybersecurity-help.cz
https://www.us-cert.gov/ics/advisories/icsa-20-070-06
us-cert.gov
and 12 more references View all →

Timeline

Published
Mar 16, 2020
Last Updated
Jun 3, 2026

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