CVE-2026-41475

HIGH EPSS 38.0%

Published Apr 24, 20262mo ago · Modified Jun 17, 20262w ago

8.7 CVSS 4.0

High

Published Apr 24, 2026 2mo ago

Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score

8.7

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

38.0% percentile

Exploit & Patch Status

Public Exploit Known

No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 4

Vendor	Product	Version	Range
bacnetstack	bacnet_stack	*	≥1.4.0 – <1.4.3
bacnetstack	bacnet_stack	1.5.0	any
bacnetstack	bacnet_stack	1.5.0	any
bacnetstack	bacnet_stack	1.5.0	any

References 1

github.com https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-cvv4-v3g6-4jmv

ExploitMitigationVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.