Disclosure summary
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.
Source-reported weakness categories
CWE-200
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-2025-40940
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