What is CVE-2026-22925?

CVE-2026-22925 is a high-severity vulnerability in Siemens Simatic Cn 4100, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-12.

How severe is CVE-2026-22925?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Siemens Simatic Cn 4100

CVE-2026-22925

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V5.0). The affected application is susceptible to resource exhaustion when subjected to high volume of TCP SYN packets This could allow an attacker to render the servi…

EPSS: 0.003 (24.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Siemens Simatic Cn 4100 — versions 0
Siemens Simatic_cn_4100
Siemens Simatic_cn_4100_firmware

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

productcert@siemens.com (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-22925?: CVE-2026-22925 is a high-severity vulnerability in Siemens Simatic Cn 4100, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-12.
How severe is CVE-2026-22925?: High severity. CVSS v3 base score is 7.5 out of 10.