What’s Vulnerable › Vulnerabilities

CVE-2021-32982: Automation Direct CLICK PLC CPU Modules Cleartext Transmission of Sensitive Information

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-04 · updated 2026-06-17
• Weakness: CWE-319

Description

Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 passwords are sent as plaintext during unlocking and project transfers. An attacker who has network visibility can observe the password exchange.

Affected products

• AutomationDirect C0-10Are-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-10Dd1E-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-10Dd2E-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-10Dre-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-11Are-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-11Dd1E-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-11Dd2E-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-11Dre-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Are-1-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Are-2-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Are-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dd1E-1-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dd1E-2-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dd1E-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dd2E-1-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dd2E-2-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dd2E-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dre-1-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dre-2-D Firmware: before 3.00 — fixed in 3.00
• AutomationDirect C0-12Dre-D Firmware: before 3.00 — fixed in 3.00

How to fix

Upgrade to a fixed version: AutomationDirect C0-10Are-D Firmware 3.00; AutomationDirect C0-10Dd1E-D Firmware 3.00; AutomationDirect C0-10Dd2E-D Firmware 3.00; AutomationDirect C0-10Dre-D Firmware 3.00; AutomationDirect C0-11Are-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 C0-12Are-1-D Firmware 3.00; AutomationDirect C0-12Are-2-D Firmware 3.00; AutomationDirect C0-12Are-D Firmware 3.00; AutomationDirect C0-12Dd1E-1-D Firmware 3.00. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02

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