Disclosure summary
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.
Source-reported weakness categories
CWE-284
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-40939
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| siemens | simatic_cn_4100_firmware | * {"versionEndExcluding":"4.0.1"} |
Original records & references
- NIST NVD record
- CVE Program record
- cert-portal.siemens.com — Vendor Advisory
PUBLISHED 2025-12-09T11:17:47-05:00
MODIFIED 2026-10-07T16:10:01-04:00
INGESTED 2026-10-08T12:35:36-04:00