Dashboard / CVE-2025-40939

CVE-2025-40939

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 45/100
Published: 2025-12-09 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Physical
AC: Low
PR: None
UI: None
S: X
AT: None
VC: None
VI: None
VA: High

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
siemens simatic_cn_4100_firmware < 4.0.1

References & Advisories (1)

Bug Bounty Relevance

45 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.1 / 10.0 v4.0
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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

EPSS — Exploitation Probability

0.21%
Raw Score 0.002130
Percentile 11.6%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00213
2026-10-28
0.00213

Intelligence Sources

nvd ref →

External Links