CVE-2020-6984

HIGH
7.5
CVSS Score
Published: March 16, 2020 at 03:41 PM UTC
Updated: June 17, 2026 at 03:24 AM UTC
8 products affected across 1 vendorMicrologix 1400-b FirmwareMicrologix 1100 FirmwareMicrologix 1400-a Firmware

Using 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 by N/A?

Get instant alerts when new vulnerabilities affect 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 - before attackers find them.

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Severity
HIGH7.5
Exploit prediction
EPSS 3%
SSVC
No known exploit

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 function utilized to protect the password in MicroLogix is discoverable.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
rockwellautomation-micrologix-1100 (same device)
All versions
rockwellautomation-micrologix-1400 (same device)
v ≤ 21.001
rockwellautomation-micrologix-1400 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party AdvisoryUS Government Resource
https://www.us-cert.gov/ics/advisories/icsa-20-070-06

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-327

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