CVE-2021-22681
Rockwell Multiple Products Insufficient Protected Credentials Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-03-05. Federal due date: 2026-03-26.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rockwellautomation | Factorytalk Services Platform | from 2.10 |
| Rockwellautomation | Rslogix 5000 | from 16 through 20 |
| Rockwellautomation | Studio 5000 Logix Designer | from 21.0 |