CVE-2021-22681

CRITICAL KEV

Rockwell Automation Studio 5000 <21 - Path Traversal

Title source: llm

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.

References (2)

[Third Party Advisory, US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22681

[Third Party Advisory, US Government Resource] https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03

Scores

CVSS v3 9.8

EPSS 0.1538

EPSS Percentile 94.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CISA KEV 2026-03-05

VulnCheck KEV 2026-03-05

ENISA EUVD EUVD-2021-9817

CWE

CWE-522

Status published

Products (3)

rockwellautomation/factorytalk_services_platform 2.10

rockwellautomation/rslogix_5000 16 - 20

rockwellautomation/studio_5000_logix_designer 21.0

Published Mar 03, 2021

KEV Added Mar 05, 2026

Tracked Since Feb 18, 2026