Status: UPDATED | Advisory ID: CVE-2026-22925
| CVE | CVE-2026-22925 |
| CVSS Score / Version | 7.5 (High) / CVSS v3.1 |
| Updated | 2026-06-29 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high. |
| Affected products | Siemens SIMATIC CN 4100 and Siemens simatic_cn_4100_firmware |
| Classified as | CWE-770 (Allocation of Resources Without Limits or Throttling) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Siemens | SIMATIC CN 4100 | ||
| Siemens | simatic_cn_4100_firmware |
| Subsystems | General OT |
| Sectors | Multiple |
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. (NVD)
Monitor Siemens's web page for any future patch releases. See vendor advisory link below.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-22925 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-22925 |
| Vendor advisory | https://cert-portal.siemens.com/productcert/html/ssa-032379.html |