9.8

CVE-2020-6984: rockwellautomation micrologix_1400_b_firmware

CVSS: 9.8v3.1CriticalModified
Published 16-03-2020Last modified 03-06-2026
Open JSON

Vulnerability summary

CVE-2020-6984 is a critical (CVSS 9.8) vulnerability in rockwellautomation micrologix_1400_b_firmware. EPSS estimates a 2.85% chance of exploitation in the next 30 days, higher than 86.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
2.85%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-03-2020
    PublishedVulnerability first disclosed.
  2. 03-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.85%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

0.00 pp

From 2.85% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.85%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Rockwellautomation2 products

1 vendor · 2 products

References

1 links