Skip to main content

CVE-2021-22681

Rockwell — Rockwell Multiple Products Insufficient Protected Credentials Vulnerability

Rockwell · CWE-522 · in CISA KEV since 2026-03-05

CISA federal deadline · Overdue by 7 monthsCISA KEVActively Exploited
80

EVRS 80 of 100 Urgent

Patch This Cycle

Rank 607 of 2,960 tracked

Download PDF

Why it scores 80

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.636.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

rslogix 5000: update to a version newer than 20

Affected versions

  • factorytalk services platform>= 2.10
  • rslogix 5000>= 16 <= 20
  • studio 5000 logix designer>= 21.0
  • compact guardlogix 5370
  • compact guardlogix 5380
  • compactlogix 1768
  • compactlogix 1769
  • compactlogix 5370

+12 more affected products; see the full list at NVD.

Remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.636 (99.22nd pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2026-03-26 · CISA federal deadline · Overdue by 7 months CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by icscert. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do