Vulnerability details
CVE-2025-40556
Siemens BACnet ATEC 550-440Siemens BACnet ATEC 550-441Siemens BACnet ATEC 550-445Siemens BACnet ATEC 550-446
CVSS 4.0
7.1High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 4.0 | CVEProject cvelistV5 (CNA) (siemens) | 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 |
| 6.5Medium | 3.1 | CVEProject cvelistV5 (CNA) (siemens) | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Siemens | BACnet ATEC 550-440 | All | CVEProject cvelistV5 (CNA) |
| Siemens | BACnet ATEC 550-441 | All | CVEProject cvelistV5 (CNA) |
| Siemens | BACnet ATEC 550-445 | All | CVEProject cvelistV5 (CNA) |
| Siemens | BACnet ATEC 550-446 | All | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2025-05-13
- Last updated
- 2025-05-13
- State
- Published
- Assigner (CNA)
- siemens
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
16.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-20Improper Input Validation