What is CVE-2026-22924?

CVE-2026-22924 is a critical-severity vulnerability in Siemens Simatic Cn 4100, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-05-12.

How severe is CVE-2026-22924?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Siemens Simatic Cn 4100

CVE-2026-22924

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V5.0). The affected application does not properly restrict unauthenticated connections and is susceptible to resource exhaustion conditions. This could allow an attack…

Vulnerability class: Broken Authentication

EPSS: 0.001 (16.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Siemens Simatic Cn 4100 — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

productcert@siemens.com

Frequently asked questions

What is CVE-2026-22924?: CVE-2026-22924 is a critical-severity vulnerability in Siemens Simatic Cn 4100, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-05-12.
How severe is CVE-2026-22924?: Critical severity. CVSS v3 base score is 9.1 out of 10.