Description
Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.
Published: 2021-03-03
Score: 9.8 Critical
EPSS: 15.4% Moderate
KEV: Yes
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-9817 Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.
History

Thu, 05 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 05 Mar 2026 19:45:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-03-05T00:00:00+00:00', 'dueDate': '2026-03-26T00:00:00+00:00'}


Fri, 11 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00102}

epss

{'score': 0.00137}


Subscriptions

Rockwellautomation Compact Guardlogix 5370 Compact Guardlogix 5380 Compactlogix 1768 Compactlogix 1769 Compactlogix 5370 Compactlogix 5380 Compactlogix 5480 Controllogix 5550 Controllogix 5560 Controllogix 5570 Controllogix 5580 Drivelogix 1794-l34 Drivelogix 5560 Drivelogix 5730 Factorytalk Services Platform Guardlogix 5570 Guardlogix 5580 Rslogix 5000 Softlogix 5800 Studio 5000 Logix Designer
cve-icon MITRE

Status: PUBLISHED

Assigner: icscert

Published:

Updated: 2026-03-06T05:01:20.925Z

Reserved: 2021-01-05T00:00:00.000Z

Link: CVE-2021-22681

cve-icon Vulnrichment

Updated: 2024-08-03T18:51:06.940Z

cve-icon NVD

Status : Analyzed

Published: 2021-03-03T18:15:14.643

Modified: 2026-03-06T13:44:06.370

Link: CVE-2021-22681

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses