What’s Vulnerable › Vulnerabilities

CVE-2025-55038: AutomationDirect CLICK PLUS Missing Authorization

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-23 · updated 2026-10-18
• Weakness: CWE-862

Description

An authorization bypass vulnerability has been discovered in the Click Plus C2-03CPU2 device firmware version 3.60. Through the KOPR protocol utilized by the Remote PLC application, authenticated users with low-level access permissions can exploit this vulnerability to read and modify PLC variables beyond their intended authorization level.

Affected products

• AutomationDirect CLICK PLUS C0-0x CPU firmware: before v3.71 — fixed in v3.71
• AutomationDirect CLICK PLUS C0-1x CPU firmware: before v3.71 — fixed in v3.71
• AutomationDirect CLICK PLUS C2-x CPU firmware: before v3.71 — fixed in v3.71

How to fix

Upgrade to a fixed version: AutomationDirect CLICK PLUS C0-0x CPU firmware v3.71; AutomationDirect CLICK PLUS C0-1x CPU firmware v3.71; AutomationDirect CLICK PLUS C2-x CPU firmware v3.71. Check the vendor advisory for mitigations.

References

• https://www.automationdirect.com/support/software-downloads
• https://www.cisa.gov/news-events/ics-advisories/icsa-25-266-01

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