AutomationDirect CLICK PLUS firmware multiple critical flaws
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Six vulnerabilities in AutomationDirect CLICK PLUS firmware enable remote information disclosure, privilege escalation, and denial of service; upgrade to v3.80.
CISA has published an advisory detailing six vulnerabilities affecting AutomationDirect CLICK PLUS programmable logic controllers (PLCs), including C0-0x, C0-1x, and C2-x series models running firmware prior to v3.71. The flaws span cleartext storage of credentials, hard-coded cryptographic keys, broken RSA implementation, predictable PRNG seeds, and authorization bypass. The most severe (CVE-2025-59484 and CVE-2025-55069) achieve CVSS v4 scores of 8.7 and enable remote information disclosure and modification of device settings with low attack complexity and no authentication required. Two additional vulnerabilities (CVE-2025-58473, CVE-2025-57882) permit denial-of-service attacks by exhausting device sessions. A privilege-escalation flaw (CVE-2025-55038) allows low-privileged authenticated users to read and modify PLC variables beyond their authorization scope. Researchers at Nozomi Networks discovered and reported these issues. No active exploitation in the wild has been reported as of the advisory publication date.
Affected organizations should immediately update firmware to v3.80. Pending patching, defensive measures include network isolation, access control restrictions, logging and monitoring, secure backups, and VPN-based remote access where needed. Organizations should evaluate their risk posture and control-system network exposure before applying patches, as ICS environments require careful change management.
Mentioned in this report
Source reporting: https://www.cisa.gov/news-events/ics-advisories/icsa-25-266-01
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