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CRITICAL · 9.8

CVE-2021-32986

After Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 is unlocked by an authorized user, the unlocked state does not timeout. If the programming software is interrupte...

Vulnerability Description

After Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 is unlocked by an authorized user, the unlocked state does not timeout. If the programming software is interrupted, the PLC remains unlocked. All subsequent programming connections are allowed without authorization. The PLC is only relocked by a power cycle, or when the programming software disconnects correctly.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
AutomationdirectC0-10Dd1E-D Firmware< 3.00
AutomationdirectC0-10Dd1E-D-
AutomationdirectC0-10Dd2E-D Firmware< 3.00
AutomationdirectC0-10Dd2E-D-
AutomationdirectC0-10Dre-D Firmware< 3.00
AutomationdirectC0-10Dre-D-
AutomationdirectC0-10Are-D Firmware< 3.00
AutomationdirectC0-10Are-D-
AutomationdirectC0-11Dd1E-D Firmware< 3.00
AutomationdirectC0-11Dd1E-D-
AutomationdirectC0-11Dd2E-D Firmware< 3.00
AutomationdirectC0-11Dd2E-D-
AutomationdirectC0-11Dre-D Firmware< 3.00
AutomationdirectC0-11Dre-D-
AutomationdirectC0-11Are-D Firmware< 3.00
AutomationdirectC0-11Are-D-
AutomationdirectC0-12Dd1E-D Firmware< 3.00
AutomationdirectC0-12Dd1E-D-
AutomationdirectC0-12Dd2E-D Firmware< 3.00
AutomationdirectC0-12Dd2E-D-

Related Weaknesses (CWE)

CWE-863CWE-288

References

FAQ

What is CVE-2021-32986?

CVE-2021-32986 is a vulnerability with a CVSS score of 9.8 (CRITICAL). After Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 is unlocked by an authorized user, the unlocked state does not timeout. If the programming software is interrupte...

How severe is CVE-2021-32986?

CVE-2021-32986 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-32986?

Check the references section above for vendor advisories and patch information. Affected products include: Automationdirect C0-10Dd1E-D Firmware, Automationdirect C0-10Dd1E-D, Automationdirect C0-10Dd2E-D Firmware, Automationdirect C0-10Dd2E-D, Automationdirect C0-10Dre-D Firmware.