What’s Vulnerable › Vulnerabilities

CVE-2022-2003: AutomationDirect DirectLOGIC with Serial Communication Cleartext Transmission

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-31 · updated 2026-06-17
• Weakness: CWE-319

Description

AutomationDirect DirectLOGIC is vulnerable to a specifically crafted serial message to the CPU serial port that will cause the PLC to respond with the PLC password in cleartext. This could allow an attacker to access and make unauthorized changes. This issue affects: AutomationDirect DirectLOGIC D0-06 series CPUs D0-06DD1 versions prior to 2.72; D0-06DD2 versions prior to 2.72; D0-06DR versions prior to 2.72; D0-06DA versions prior to 2.72; D0-06AR versions prior to 2.72; D0-06AA versions prior to 2.72; D0-06DD1-D versions prior to 2.72; D0-06DD2-D versions prior to 2.72; D0-06DR-D versions prior to 2.72;

Affected products

• AutomationDirect D0-06Aa Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Ar Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Da Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Dd1-D Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Dd1 Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Dd2-D Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Dd2 Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Dr-D Firmware: before 2.72 — fixed in 2.72
• AutomationDirect D0-06Dr Firmware: before 2.72 — fixed in 2.72

How to fix

Upgrade to a fixed version: AutomationDirect D0-06Aa Firmware 2.72; AutomationDirect D0-06Ar Firmware 2.72; AutomationDirect D0-06Da Firmware 2.72; AutomationDirect D0-06Dd1-D Firmware 2.72; AutomationDirect D0-06Dd1 Firmware 2.72; AutomationDirect D0-06Dd2-D Firmware 2.72; AutomationDirect D0-06Dd2 Firmware 2.72; AutomationDirect D0-06Dr-D Firmware 2.72; AutomationDirect D0-06Dr Firmware 2.72. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-02
• https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-03
• https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-02
• https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-03

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