CVE-2025-55069Network attack vector

Private-key compromise via predictable PRNG seeding

Published Sep 23, 2025 · Updated Sep 23, 2025

Predictable PRNG seeding in AutomationDirect CLICK PLUS firmware before 3.71 allows remote attackers to compromise generated private keys. The firmware initializes its pseudo-random generator with a predictable seed, causing private-key generation to produce guessable key material. Exploitation is network-reachable without privileges but requires passive user interaction; public records do not identify the affected key-generation path.

CVSS severity8.7
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable PRNG seeding in AutomationDirect CLICK PLUS firmware before 3.71 allows remote attackers to compromise generated private keys. The firmware initializes its pseudo-random generator with a predictable seed, causing private-key generation to produce guessable key material. Exploitation is network-reachable without privileges but requires passive user interaction; public records do not identify the affected key-generation path.

The record

CVE
CVE-2025-55069
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
AutomationDirect
Product
CLICK PLUS C2-x CPU firmware
Classifications
CWE-337
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <v3.71

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AutomationDirect · CLICK PLUS C2-x CPU firmwareversion=0 <v3.71
AutomationDirect · CLICK PLUS C0-1x CPU firmwareversion=0 <v3.71
AutomationDirect · CLICK PLUS C0-0x CPU firmwareversion=0 <v3.71

Published CVSS scores

8.3ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
8.7ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-337Predictable Seed in Pseudo-Random Number Generator (PRNG)

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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