PT-2025-28392 · Siemens · Simatic Cn 4100

CVE-2025-40593 · Published 2025-07-08 · Updated 2025-07-10

Positive Technologies (AI Summary)

CVSS v4.0

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: SIMATIC CN 4100 versions prior to V4.0

Description: A vulnerability has been identified that allows an attacker to control the device by storing arbitrary files in the SFTP folder, potentially causing a denial of service condition.

Recommendations: For versions prior to V4.0, update to version V4.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the SFTP folder to minimize the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2026-00189

CVE-2025-40593

Affected Products

Simatic Cn 4100

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2025-40593 · Security Note
• https://cert-portal.siemens.com/productcert/html/ssa-626991.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-40593 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00189 · Security Note
• https://twitter.com/0dayPublishing/status/1943346785868517622 · Twitter Post
• https://twitter.com/CVEnew/status/1942535945045303527 · Twitter Post