CVE-2025-40940 — MEDIUM (4.9)

Q: How severe is CVE-2025-40940?

CVE-2025-40940 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-40940?

Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic Cn 4100 Firmware, Siemens Simatic Cn 4100.

Vulnerability 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.

CVSS Score

4.9

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Siemens	Simatic Cn 4100 Firmware	< 4.0.1
Siemens	Simatic Cn 4100	-

Related Weaknesses (CWE)

CWE-200

References

https://cert-portal.siemens.com/productcert/html/ssa-416652.htmlVendor Advisory

FAQ

What is CVE-2025-40940?

CVE-2025-40940 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 con...

How severe is CVE-2025-40940?

CVE-2025-40940 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-40940?

Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic Cn 4100 Firmware, Siemens Simatic Cn 4100.