Description
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.4 and 1.5.1, an out-of-bounds read vulnerability exists in bacnet-stack's AtomicWriteFile record-access path. The bug is caused by a mismatch between an externally controlled returnedRecordCount field and the fixed-size internal fileData[] array used by BACNET_ATOMIC_WRITE_FILE_DATA. This issue has been patched in versions 1.4.4 and 1.5.1.
Published: 2026-11-12
Score: 7.5 High
EPSS: n/a
KEV: No
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History

Thu, 12 Nov 2026 20:15:00 +0000

Type Values Removed Values Added
Description BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.4 and 1.5.1, an out-of-bounds read vulnerability exists in bacnet-stack's AtomicWriteFile record-access path. The bug is caused by a mismatch between an externally controlled returnedRecordCount field and the fixed-size internal fileData[] array used by BACNET_ATOMIC_WRITE_FILE_DATA. This issue has been patched in versions 1.4.4 and 1.5.1.
Title BACnet Stack: Out-of-Bounds Read in AtomicWriteFile Record Decoder via Unbounded returnedRecordCount
Weaknesses CWE-121
CWE-125
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-12T20:00:21.167Z

Reserved: 2026-05-15T21:46:51.547Z

Link: CVE-2026-46674

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-12T20:18:39.080

Modified: 2026-11-12T20:18:39.080

Link: CVE-2026-46674

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses