CVE-2021-22681Rockwell Multiple Products Insufficient Protected Credentials Vulnerability
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 7.5 | HIGH | 2.0NVD | AV:N/AC:L/Au:N/C:P/I:P/A:P |
CISA required action
⚡ Known exploited · remediation due Mar 26, 2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2021-22681
- Status
- Analyzed
- Assigner (CNA)
- icscert
- Published
- Mar 3, 2021
- Last modified
- 2026-06-17 03:37 UTC
- Weaknesses
- CWE-522 · Insufficiently Protected Credentials CWE-522
Affected Products
As published by the CNA in the CVE record.
Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers8 version ranges
- RSLogix 5000 Versions 16 through 20
- Studio 5000 Logix Designer: Versions 21 and later
- 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