---
id: CVE-2026-22925
title: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V5.0)
summary: "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\r\nThis could allow an attacker to render the ser…"
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
published: '2026-05-12'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-22925'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-032379.html'
    label: productcert@siemens.com
tags:
  - nvd
epss: 0.00324
epssPercentile: 0.22709
ingestedAt: '2026-06-29T14:29:18.076Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.