Auth bypass in Pilz Industrialpi 4 With Firmware Bullseye

CVE-2025-41656

An unauthenticated remote attacker can run arbitrary commands on the affected devices with high privileges because the authentication for the Node_RED server is not configured by default.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.138 (96.4th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-41656: rose from 0.127 to 0.138.

EPSS over last 30 days · oldest: 0.127 · newest: 0.138 · change: +0.011

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-41656?
CVE-2025-41656 is a critical-severity vulnerability in Pilz Industrialpi 4 With Firmware Bullseye, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2025-07-01.
How severe is CVE-2025-41656?
Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2025-41656 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.