Man-in-the-Middle Vulnerability in Siemens Software Products
CVE-2025-40801

9.2CRITICAL

Key Information:

Vendor

Siemens
Status
Comos V10.6
Jt Bi-directional Translator For Step
Nx V2412
Nx V2506
Vendor
CVE Published:
9 December 2025

What is CVE-2025-40801?

A vulnerability exists in the SALT SDK used across various Siemens software products due to missing server certificate validation during TLS connections to the authorization server. This flaw could allow malicious actors to execute man-in-the-middle attacks, intercepting and potentially altering communications between clients and the server. Users of affected products should take immediate action to mitigate this risk by monitoring their systems and applying necessary updates.

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Affected Version(s)

COMOS V10.6 0

COMOS V10.6 0

JT Bi-Directional Translator for STEP 0

References

https://cert-portal.siemens.com/productcert/html/ssa-7104...
https://cert-portal.siemens.com/productcert/html/ssa-2129...

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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