AUGUST 4, 2026
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Case File

CVE-2025-40556

MEDIUM · CVSS 6.5 EPSS 0.22%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-05-13 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It may lead to a denial-of-service condition.

CVE
CVE-2025-40556
Severity
MEDIUM
CVSS
6.5
EPSS
0.22%

Original NVD 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.