CVE-2025-40556 | THREATINT

Description

A vulnerability has been identified in BACnet ATEC 550-440 (All versions), BACnet ATEC 550-441 (All versions), BACnet ATEC 550-445 (All versions), BACnet ATEC 550-446 (All versions). Affected devices improperly handle specific incoming BACnet MSTP messages. This could allow an attacker residing in the same BACnet network to send a specially crafted MSTP message that results in a denial of service condition of the targeted device. A power cycle is required to restore the device's normal operation.

Reserved 2025-04-16 | Published 2025-05-13 | Updated 2025-05-13 | Assigner siemens

MEDIUM: 6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

HIGH: 7.1CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-20: Improper Input Validation

Product status

Default status

unknown

Any version before *

affected

Default status

unknown

Any version before *

affected

Default status

unknown

Any version before *

affected

Default status

unknown

Any version before *

affected

References

cert-portal.siemens.com/productcert/html/ssa-828116.html

cve.org (CVE-2025-40556)

nvd.nist.gov (CVE-2025-40556)

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