HOMEVULNERABILITIESCVE-2020-6984
HIGH

CVE-2020-6984

CWE-327Published: March 16, 2020· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-6984 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

rockwellautomation6 product(s)
micrologix 1400 a firmwaremicrologix 1400 b firmwaremicrologix 1400micrologix 1100 firmwaremicrologix 1100rslogix 500
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.us-cert.gov/ics/advisories/icsa-20-070-06
ADVISORYhttps://www.us-cert.gov/ics/advisories/icsa-20-070-06

All References (2)

→
https://www.us-cert.gov/ics/advisories/icsa-20-070-06Third Party Advisory · US Government Resource
→
https://www.us-cert.gov/ics/advisories/icsa-20-070-06Third Party Advisory · US Government Resource

Quick Facts

CVE IDCVE-2020-6984
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-327
CISA KEVNo
Affected1 vendor(s)
PublishedMar 16, 2020

Related CVEs (CWE-327)

CVE-2026-50086
10.0
CVE-2025-54426
9.9
CVE-2014-9969
9.8
CVE-2017-4917
9.8
CVE-2012-4449
9.8
CVE-2017-17878
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-6984 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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