Credential Derivation Vulnerability in Blueplanet Devices by Siemens
CVE-2025-40946

7.2HIGH

Key Information:

Vendor

Siemens
Status
Blueplanet 100 Nx3 M8
Blueplanet 100 Tl3 Gen2
Blueplanet 105 Tl3
Blueplanet 105 Tl3 Gen2
Vendor
CVE Published:
12 May 2026

What is CVE-2025-40946?

A vulnerability has been detected in several Siemens Blueplanet devices that utilizes a CRC16-based algorithm for generating Technical Service credentials. This flaw enables an attacker to derive valid credentials from a device's serial number, which can potentially lead to unauthorized access. Affected devices include multiple models and versions of the Blueplanet series, necessitating urgent attention from users to mitigate risks associated with this issue.

Affected Version(s)

blueplanet 100 NX3 M8 0

blueplanet 100 TL3 GEN2 0

blueplanet 105 TL3 0

References

https://cert-portal.siemens.com/productcert/html/ssa-5456...

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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