CVE-2025-40938

CRITICAL EPSS 24.1%

Published Dec 9, 20256mo ago · Modified Jun 17, 20262w ago

9.2 CVSS 4.0

Critical

Published Dec 9, 2025 6mo ago

Last Modified Jun 17, 2026 2w ago

Description

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information, potentially impacting the device’s confidentiality, integrity, and availability.

CVSS Details

Base Score

9.2

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

24.1% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-798 Use of Hard-coded Credentials Authentication

Affected Products 2

Vendor	Product	Version	Range
siemens	simatic_cn_4100_firmware	*	<4.0.1
siemens	simatic_cn_4100	*	any

References 1

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

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.