CVE-2021-32980

Name: CVE-2021-32980
Creator: NVD / NIST
Published: 2022-04-04T20:15:08.94+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.07%

Last modified Jun 17, 2026

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

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.07%

60.6th percentile

Probability of exploitation in the next 30 days. Learn more

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: Apr 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32980?

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.

Are you affected by CVE-2021-32980?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST