Vulnerability · Published Sep 23, 2025 · Assigned by icscert
CVE-2025-55069AutomationDirect CLICK PLUS Predictable Seed in Pseudo-Random Number Generator
High 8.3
In plain English
A high-severity security flaw in CLICK PLUS C0-0x CPU firmware from AutomationDirect. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Severity (CVSS 3.1)8.3High
Exploit odds (30 days)0.3%top 76.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A predictable seed in pseudo-random number generator vulnerability has been discovered in firmware version 3.60 of the Click Plus PLC. The vulnerability relies on the fact that the software implements a predictable seed for its pseudo-random number generator, which compromises the security of the generated private keys.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AutomationDirect | CLICK PLUS C0-0x CPU firmware | 0 – before v3.71 |
| AutomationDirect | CLICK PLUS C0-1x CPU firmware | 0 – before v3.71 |
| AutomationDirect | CLICK PLUS C2-x CPU firmware | 0 – before v3.71 |
Weakness: CWE-337 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L