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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | BACnet ATEC 550-440 | — | — |
| Siemens | BACnet ATEC 550-441 | — | — |
| Siemens | BACnet ATEC 550-445 | — | — |
| Siemens | BACnet ATEC 550-446 | — | — |
Advisories 3
- NCSC-2025-0160 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · May 14, 2025
- ICSA-25-135-03 Siemens BACnet ATEC Devices CISA ICS & IT advisories · May 13, 2025
- SSA-828116 SSA-828116: Denial of Service Vulnerability in BACnet ATEC Devices Siemens ProductCERT · May 13, 2025