CVE-2021-22681: Rockwell Multiple Products Insufficient Protected Credentials Vulnerability
Affects Rockwell Multiple ProductsSource CISA KEV
No CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 03/05/2026
- KEV deadline
- 03/26/2026
- EPSS
- 63.6% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- support.rockwellautomation.com/app/answers/answer_view/a_id/1130301/~/cve-2021-22681%3A-authentication-bypass-vulnerability-found-in-logix-controllers- (opens in a new tab)
- cisa.gov/news-events/ics-advisories/icsa-21-056-03 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2021-22681 (opens in a new tab)
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.
Weaknesses
References
- support.rockwellautomation.com/app/answers/answer_view/a_id/1130301/~/cve-2021-22681%3A-authentication-bypass-vulnerability-found-in-logix-controllers- (opens in a new tab)
- cisa.gov/news-events/ics-advisories/icsa-21-056-03 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2021-22681 (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?search=CVE-2021-22681 (opens in a new tab)