CVE-2025-40939
MEDIUMSIMATIC CN 4100 < 4.0.1 - Unauthenticated Denial of Service via USB Port
Title source: llmDescription
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.
References (1)
Core 1
Core References
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-416652.html
Scores
CVSS v3
4.6
EPSS
0.0004
EPSS Percentile
13.8%
Attack Vector
PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
Status
published
Products (1)
siemens/simatic_cn_4100_firmware
< 4.0.1
Published
Dec 09, 2025
Tracked Since
Feb 18, 2026