CVE-2021-22681 — Rockwell Multiple Products: Rockwell Multiple Products Insufficient Protected Credentials Vulnerability
CVE-2021-22681 — 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 expl
What This Means For You
- CISA has confirmed active exploitation — immediate patching required.
- Added to CISA KEV catalog — federal agencies must remediate by 2026-03-26.
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2021-22681 | Auth Bypass | Rockwell Studio 5000 Logix Designer software, insufficient protected credentials vulnerability, key discovery allowing unauthorized application to connect with Logix controllers. |
| CVE-2021-22681 | Misconfiguration | Rockwell Multiple Products, insufficient protected credentials vulnerability, key used to verify Logix controllers are communicating with Rockwell Automation design software. |
Source & Attribution
| Source Platform | CISA |
| Channel | CISA KEV |
| Published | March 05, 2026 at 14:00 UTC |
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