Denial of Service Vulnerability in BACnet ATEC Devices by Siemens
CVE-2025-40556

7.1HIGH

Key Information:

Vendor

Siemens
Status
Bacnet Atec 550-440
Bacnet Atec 550-441
Bacnet Atec 550-445
Bacnet Atec 550-446
Vendor
CVE Published:
13 May 2025

What is CVE-2025-40556?

A vulnerability has been identified in BACnet ATEC devices that allows an attacker on the same network to send specially crafted MSTP messages. This improper handling of incoming messages can lead to a denial of service condition, requiring a power cycle to restore normal operation. Organizations utilizing affected devices should take precautions to secure their networks against potential exploitation.

Affected Version(s)

BACnet ATEC 550-440 0

BACnet ATEC 550-441 0

BACnet ATEC 550-445 0

References

https://cert-portal.siemens.com/productcert/html/ssa-8281...

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
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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