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CVE-2025-40593

MEDIUM
6.5
CVSS Score
Published: July 8, 2025 at 10:34 AM UTC
Updated: June 17, 2026 at 09:21 AM UTC
2 products affected across 1 vendorSIMATIC Cn 4100 FirmwareSIMATIC CN 4100

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SIMATIC Cn 4100 Firmware· Siemens
95%
v < 4.0
siemens-simatic-cn-4100 (same device)
SIMATIC CN 4100· Siemens
60%
v < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/html/ssa-626991.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMsiemens
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20

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