What’s Vulnerable › Vulnerabilities
CVE-2025-40940
- Severity: medium (CVSS 4.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-09 · updated 2026-10-23
- Weakness: CWE-200
Description
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.
Affected products
- Siemens SIMATIC CN 4100: before 4.0.1 — fixed in 4.0.1
How to fix
Upgrade to a fixed version: Siemens SIMATIC CN 4100 4.0.1. Check the vendor advisory for mitigations.
References
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