All vulnerabilities
CVE-2021-22681

Rockwell Multiple Products Insufficient Protected Credentials Vulnerability

Rockwell Multiple ProductsIndustrial & IoT
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 5 Mar 2026CISA KEV
Exploit odds (EPSS)63.6%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline26 Mar 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 3 Mar 2021, 17:59 UTCPublishedCVE List
  2. 5 Mar 2026Added to CISA KEVCISA KEV

Description

Multiple Rockwell products contain an insufficient protected credentials vulnerability. Studio 5000 Logix Designer software may allow a key to be discovered. This key is used to verify Logix controllers are communicating with Rockwell Automation design software. If successfully exploited, this vulnerability could allow an unauthorized application to connect with Logix controllers. To leverage this vulnerability, an unauthorized user would require network access to the controller.

Text from CVE List

Affected versions 8

  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: RSLogix 5000 Versions 16 through 20CVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: Studio 5000 Logix Designer: Versions 21 and laterCVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: CompactLogix 1768, 1769, 5370, 5380, 5480CVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: ControlLogix 5550, 5560, 5570, 5580CVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: DriveLogix 5560, 5730, 1794-L34CVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: Compact GuardLogix 5370, 5380CVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: GuardLogix 5570, 5580CVE List
  • Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllersaffected: SoftLogix 5800CVE List

References 5