CVE-2021-32980
CRITICALCVSS 9.8/10EPSS 1.07%
Last modified
CVE-2021-32980 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.
Description
Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Automationdirect | C0-10dd1e-D Firmware | < 3.00 |
| Automationdirect | C0-10dd2e-D Firmware | < 3.00 |
| Automationdirect | C0-10dre-D Firmware | < 3.00 |
| Automationdirect | C0-10are-D Firmware | < 3.00 |
| Automationdirect | C0-11dd1e-D Firmware | < 3.00 |
| Automationdirect | C0-11dd2e-D Firmware | < 3.00 |
| Automationdirect | C0-11dre-D Firmware | < 3.00 |
| Automationdirect | C0-11are-D Firmware | < 3.00 |
| Automationdirect | C0-12dd1e-D Firmware | < 3.00 |
| Automationdirect | C0-12dd2e-D Firmware | < 3.00 |
| Automationdirect | C0-12dre-D Firmware | < 3.00 |
| Automationdirect | C0-12are-D Firmware | < 3.00 |
| Automationdirect | C0-12dd1e-1-D Firmware | < 3.00 |
| Automationdirect | C0-12dd2e-1-D Firmware | < 3.00 |
| Automationdirect | C0-12dre-1-D Firmware | < 3.00 |
| Automationdirect | C0-12are-1-D Firmware | < 3.00 |
| Automationdirect | C0-12dd1e-2-D Firmware | < 3.00 |
| Automationdirect | C0-12dd2e-2-D Firmware | < 3.00 |
| Automationdirect | C0-12dre-2-D Firmware | < 3.00 |
| Automationdirect | C0-12are-2-D Firmware | < 3.00 |
References
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02Third Party Advisory, US Government Resource
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-32980?
Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.
How severe is CVE-2021-32980?
CVE-2021-32980 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.
How do I fix CVE-2021-32980?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-32980?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST