CVE-2025-40941: siemens simatic_cn_4100_firmware
CVSS: 5.3v4.0MediumAnalyzed
Published 09-12-2025Last modified 09-12-2025
Vulnerability summary
CVE-2025-40941 is a medium (CVSS 5.3) vulnerability in siemens simatic_cn_4100_firmware. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.4% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v4.0 (CVE.org)EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-12-2025PublishedVulnerability first disclosed.
- 09-12-2025Last modifiedVulnerability information updated.
Description
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected devices exposes server information in its responses. This could allow an attacker with network access to gain useful information, increasing the likelihood of targeted attacks.
CVSS metrics
4 scores · 2 sources · 2 versionsMedium 5.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NSourcesAll 2 agree
- NVDNIST5.3MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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
Medium 4.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NSourcesAll 2 agree
- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
19%
Versus all other CVEs
30-day change
0.00 pp
From 0.28% on 20-09-2026
20-09-202620-10-2026
EPSS score0.28%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Siemens1 product
- simatic_cn_4100_firmware< V4.0.1 | < 4.0.1
1 vendor · 1 product
References
1 links- cert-portal.siemens.com/productcert/html/ssa-416652.htmlVendor Advisory