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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AutomationDirect | CLICK PLUS C0-0x CPU firmware | < v3.71 | v3.71 |
| AutomationDirect | CLICK PLUS C0-1x CPU firmware | < v3.71 | v3.71 |
| AutomationDirect | CLICK PLUS C2-x CPU firmware | < v3.71 | v3.71 |
Advisories 1
- ICSA-25-266-01 AutomationDirect CLICK PLUS CISA ICS & IT advisories · Sep 23, 2025