CVE-2025-40593

mediumpriority · track · 0EPSS 0.004 · 33 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.39% (33rd) EPSS

CVSS 6.5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSIMATIC CN 4100siemens_psirt
Update to V4.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814144/
FixedSIMATIC CN 4100cisa_csaf_ot
Update to V4.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814144/

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.1

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · productcert@siemens.com DEexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · Siemens ProductCERT DE

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v4.07.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/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:Xsecondary · productcert@siemens.com DE

v4.07.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.04.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20USCWE-20USCWE-20USCWE-20US

affected products (6)

Products and version ranges known to be affected.

SIMATIC CN 4100all versionscisa_csaf_otUS
Siemens SIMATIC CN 4100≤ vers:all/<V4.0cisa_csaf_otUS
Siemens SIMATIC CN 41000 → V4.0enisa_euvdEU
Siemens AG SIMATIC CN 4100≤ 4.0fstec_bduRU
siemens simatic cn 4100 firmware< 4.0nvdUScpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:*
Siemens SIMATIC CN 4100≤ vers:all/<V4.0siemens_psirtDE

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2025-0211Kwetsbaarheden verholpen in Siemens productenNL2025-07-08csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als SIMATIC, SINEC, SIPROTEC, Solid Edge en TIA,
SSA-626991SSA-626991: Denial of Service Vulnerability in SIMATIC CN 4100 before V4.02025-07-08csaf · siemens_psirtDE
A vulnerability in SIMATIC CN 4100 could allow an attacker to cause a denial of service condition. Siemens has released a new version for SIMATIC CN 4100 and recommends to update to the latest version.
ICSA-25-191-04Siemens SIMATIC CN 41002025-07-08icsa · cisa_csaf_otUS
A vulnerability in SIMATIC CN 4100 could allow an attacker to cause a denial of service condition. Siemens has released a new version for SIMATIC CN 4100 and recommends to update to the latest version.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd siemens_psirt ncsc_nl NVD CVE.org MITRE

published 2025-07-08modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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