A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0). The affected application allows to control the device by storing arbitrary files in the SFTP folder of the device. This could allow an attacker to cause a denial of service condition.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00134.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Siemens SIMATIC CN 4100 unknown
Version Status Constraints
0 affected
< V4.0

Configuration 1 [-]

AND
cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:*

No data.

Vendor Product Confidence Versions
Siemens Simatic Cn 4100 — —

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Subscriptions

Vendors Products
Siemens Subscribe
Simatic Cn 4100 Subscribe
Simatic Cn 4100 Firmware Subscribe

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
EUVD EUVD EUVD-2025-20435 A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0). The affected application allows to control the device by storing arbitrary files in the SFTP folder of the device. This could allow an attacker to cause a denial of service condition.
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://cert-portal.siemens.com/productcert/html/ssa-626991.html cve-icon cve-icon
History

Tue, 16 Dec 2025 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Siemens simatic Cn 4100 Firmware
CPEs cpe:2.3:a:siemens:simatic_cn_4100:*:*:*:*:*:*:*:* cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*
Vendors & Products Siemens simatic Cn 4100 Firmware

Thu, 21 Aug 2025 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:siemens:simatic_cn_4100:*:*:*:*:*:*:*:*

Mon, 14 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00044}

 epss

{'score': 0.00049}

Tue, 08 Jul 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 08 Jul 2025 10:45:00 +0000

Type Values Removed Values Added
Description A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0). The affected application allows to control the device by storing arbitrary files in the SFTP folder of the device. This could allow an attacker to cause a denial of service condition.
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: siemens

Published:

Updated: 2025-07-08T16:11:43.633Z

Reserved: 2025-04-16T08:20:17.034Z

Link: CVE-2025-40593

cve-icon Vulnrichment

Updated: 2025-07-08T14:25:59.774Z

cve-icon NVD

Status : Analyzed

Published: 2025-07-08T11:15:29.473

Modified: 2025-12-16T19:33:11.397

Link: CVE-2025-40593

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-07-13T21:47:13Z

Weaknesses