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Fencer Vulns
high 8.3

CVE-2025-59484 json

AutomationDirect CLICK PLUS Use of a Broken or Risky Cryptographic Algorithm

published 2025-09-23 13 mo ago modified 2026-10-18 21 d ago also EUVD-2025-30937

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

The use of a broken or risky cryptographic algorithm was discovered in firmware version 3.60 of the Click Plus PLC. The vulnerability relies on the fact that the software uses an insecure implementation of the RSA encryption algorithm.

Patch / fix

  • 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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-266-01 updated cvss 8.3

AutomationDirect CLICK PLUS

  • 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
    affected: mitigation “AutomationDirect recommends that users update CLICK PLUS and firmware to V3.80.” automationdirect.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
13 mo ago

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • AutomationDirect CLICK PLUS C0-0x CPU firmware
  • AutomationDirect CLICK PLUS C0-1x CPU firmware
  • AutomationDirect CLICK PLUS C2-x CPU firmware

Classification

Weakness
  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.