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 service unavailable and cause denial-of-service conditions by overwhelming system resources.

Published 2026-05-12 · last modified 2026-06-29.

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.

EPSS exploit prediction

EPSS: 0.003 (24.0th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

cert-portal.siemens.com/productcert/html/ssa-032379.html (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.