Input validation error in Siemens products - CVE-2025-40556
Published: October 3, 2025
Vulnerability identifier: #VU116446
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-40556
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Siemens
Affected software:
BACnet ATEC 550-440
BACnet ATEC 550-441
BACnet ATEC 550-445
BACnet ATEC 550-446
BACnet ATEC 550-440
BACnet ATEC 550-441
BACnet ATEC 550-445
BACnet ATEC 550-446
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker on the local network can pass specially crafted input to the application and perform a denial of service (DoS) attack.
How to mitigate CVE-2025-40556
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.