P5Verified

CVE-2025-40940: simatic cn 4100 firmware before 4.0.1 (exclusive); +1 more affected products

CVE-2025-40940. CVSS 3.1 base score 4.9 (MEDIUM, Vendor/CNA). EPSS 0.00366 (percentile 0.28289), scored 2026-10-06.

Affected technology

simatic cn 4100 firmware · before 4.0.1 (exclusive)
siemens

SIMATIC CN 4100 · 0 to before V4.0.1
Siemens

Description’s affected range: versions < V4.0.1)

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · High privileges required · No user interaction required

What an attacker can do

An attacker could access sensitive data, potentially leading to a breach of confidentiality. Vendor/CNA’s CVSS 4.0 assessment (base score 6.9/10) rates confidentiality impact as high; integrity and availability impact as none.

Published 2026-10-07 23:05:58.952639+00:00

CWE: CWE-200
CCR priority: 19.7 /100 (P5)
CVSS 3.1: 4.9 /10 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N · Vendor/CNA
EPSS: 0.00366 · percentile 0.28289 · 2026-10-06
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-07 23:02:50.240617+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-40940.html