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 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.

• CWE-288
• CWE-863

• 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

Published

Apr 4, 2022

Last Modified

Jun 17, 2026

Status

Modified

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