CVE-2026-41475

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an out-of-bounds read vulnerability in bacnet-stack's WritePropertyMultiple service decoder allows unauthenticated remote attackers to read past allocated buffer boundaries by sending a truncated WPM request. The vulnerability stems from wpm_decode_object_property() calling the deprecated decode_tag_number_and_value() function, which performs no bounds checking on the input buffer. A crafted BACnet/IP packet with a truncated property payload causes the decoder to read 1-7 bytes past the end of the buffer, leading to crashes or information disclosure on embedded BACnet devices. This vulnerability is fixed in 1.4.3.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-cvv4-v3g6-4jmv	Exploit Mitigation Vendor Advisory
https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-cvv4-v3g6-4jmv	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:bacnetstack:bacnet_stack::::::::
	cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc1::::::
	cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc2::::::
	cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc3::::::

History

No history.

Information

Published : 2026-04-24 20:16

Updated : 2026-06-17 10:46

NVD link : CVE-2026-41475

Mitre link : CVE-2026-41475

CVE.ORG link : CVE-2026-41475

JSON object : View

Products Affected

bacnetstack

bacnet_stack

CWE

CWE-125

Out-of-bounds Read

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