CVE-2021-22681 (GCVE-0-2021-22681)
Vulnerability from cvelistv5 – Published: 2021-03-03 17:59 – Updated: 2026-03-06 05:01
VLAI
EPSS
VEX
Summary
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.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-05 00:00 UTC
CWE
- CWE-522 - Insufficiently Protected Credentials CWE-522
Assigner
icscert
CNA
References
2 references
| URL | Tags |
|---|---|
| https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03 | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers |
Affected:
RSLogix 5000 Versions 16 through 20
Affected: Studio 5000 Logix Designer: Versions 21 and later Affected: CompactLogix 1768, 1769, 5370, 5380, 5480 Affected: ControlLogix 5550, 5560, 5570, 5580 Affected: DriveLogix 5560, 5730, 1794-L34 Affected: Compact GuardLogix 5370, 5380 Affected: GuardLogix 5570, 5580 Affected: SoftLogix 5800 |
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