---
id: CVE-2026-22924
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 does not properly restrict unauthenticated connections and is susceptible to resource exhaustion conditions.\r\nThis could allow an atta…"
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-306
published: '2026-05-12'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-22924'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-032379.html'
    label: productcert@siemens.com
tags:
  - nvd
epss: 0.003
epssPercentile: 0.2012
ingestedAt: '2026-06-29T14:29:18.074Z'
---

## Overview

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 attacker to disrupt normal operations or perform unauthorized actions, potentially impacting system availability and integrity.

## Remediation

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