Description
The use of a hard-coded cryptographic key was discovered in firmware version 3.60 of the Click Plus PLC. The vulnerability relies on the fact that the software contains a hard-coded AES key used to protect the initial messages of a new KOPS session.
References (2)
Core 2
Core References
Various Sources
https://www.automationdirect.com/support/software-downloads
Third Party Advisory, US Government Resource
https://www.cisa.gov/news-events/ics-advisories/icsa-25-266-01
Scores
CVSS v3
5.3
EPSS
0.0024
EPSS Percentile
14.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-321
Status
published
Products (3)
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
Published
Sep 23, 2025
Tracked Since
Feb 18, 2026