Siemens SIMATIC CN 4100 up to 3.x SFTP Folder denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Siemens SIMATIC CN 4100 up to 3.x and classified as problematic. Affected by this vulnerability is an unknown functionality of the component SFTP Folder. Such manipulation leads to denial of service. This vulnerability is documented as CVE-2025-40593. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Siemens SIMATIC CN 4100 up to 3.x. Affected by this issue is an unknown code of the component SFTP Folder. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

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.

The advisory is available at cert-portal.siemens.com. This vulnerability is handled as CVE-2025-40593 since 04/16/2025. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 4.0 eliminates this vulnerability.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (siemens): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SIMATIC CN 4100 4.0

Timelineinfo

04/16/2025 CVE reserved
07/08/2025 +83 days Advisory disclosed
07/08/2025 +0 days VulDB entry created
08/21/2025 +44 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-626991
Status: Confirmed

CVE: CVE-2025-40593 (🔒)
GCVE (CVE): GCVE-0-2025-40593
GCVE (VulDB): GCVE-100-315326

Entryinfo

Created: 07/08/2025 13:35
Updated: 08/21/2025 17:28
Changes: 07/08/2025 13:35 (78), 08/21/2025 17:28 (1)
Complete: 🔍
Cache ID: 216::103

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