CVE-2021-32986

high-risk
Published 2022-04-04

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.

Do I need to act?

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0.29% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (20)

C0-10Dd1E-D Firmware
C0-10Dd2E-D Firmware
C0-10Dre-D Firmware
C0-10Are-D Firmware
C0-11Dd1E-D Firmware
C0-11Dd2E-D Firmware
C0-11Dre-D Firmware
C0-11Are-D Firmware
C0-12Dd1E-D Firmware
C0-12Dd2E-D Firmware
C0-12Dre-D Firmware
C0-12Are-D Firmware
C0-12Dd1E-1-D Firmware
C0-12Dd2E-1-D Firmware
C0-12Dre-1-D Firmware
C0-12Are-1-D Firmware
C0-12Dd1E-2-D Firmware
C0-12Dd2E-2-D Firmware
C0-12Dre-2-D Firmware
C0-12Are-2-D Firmware

Affected Vendors

Automationdirect

References (2)

Third Party Advisory https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02
Third Party Advisory https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02
53
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 1/34 · Minimal
Exposure 20/34 · Moderate