P4Verified

CVE-2025-40938: simatic cn 4100 firmware before 4.0.1 (exclusive); +1 more affected products

CVE-2025-40938. CVSS 3.1 base score 9.8 (CRITICAL, NVD). EPSS 0.00377 (percentile 0.2943), 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) · No privileges required · No user interaction required

What an attacker can do

An attacker could access and misuse this information, potentially impacting the device’s confidentiality, integrity, and availability. Vendor/CNA’s CVSS 4.0 assessment (base score 9.2/10) rates confidentiality, integrity and availability impact as high.

Published 2026-10-07 23:05:35.234191+00:00

CWE: CWE-798
CCR priority: 39.3 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · NVD
EPSS: 0.00377 · percentile 0.2943 · 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-2025-40938.html