Medium severity · published Jul 8, 2025
CVE-2025-40593
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0)
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Simatic CN 4100 Firmware · Siemens
before 4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40593
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40593
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-626991.html
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