CVE-2025-40593A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0). The affected application allows to control the device by…

7.1HighCVSS base score
0.40%Exploitation in 30 daysEPSS · top 66% of all CVEs
NoKnown exploitednot in CISA's KEV catalog
NonePublic exploitsnone known yet

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.

Timeline

2025
16 Apr 2025
16 Apr 2025
ID reserved
By siemens
8 Jul 20253 months later
8 Jul 2025· 3 months later
Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2025-40593, by who scored it
Scored by	CVSS	Score	Vector
siemensCNA (assigner)	4.0	High7.1	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
siemensCNA (assigner)	3.1	Medium6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Analyzed	4.0	High7.1	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/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 in 30 days): 0.40% · top 66% of all CVEs (12 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Affected products

Siemens · SIMATIC CN 4100
- affected < V4.0

References1

https://cert-portal.siemens.com/productcert/html/ssa-626991.html (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2025-40593](https://cveledger.app/badge/CVE-2025-40593.svg)](https://cveledger.app/cve/CVE-2025-40593)

Record last updated 8 Jul 2025, 16:11 UTC.