CVE-2026-46674
Published:November 12, 2026
Updated:November 13, 2026
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.
Affected Packages
https://github.com/bacnet-stack/bacnet-stack.git (GITHUB):
Affected version(s) =bacnet-stack-1.5.0 <bacnet-stack-1.5.1Fix Suggestion:
Update to version bacnet-stack-1.5.1https://github.com/bacnet-stack/bacnet-stack.git (GITHUB):
Affected version(s) =bacnet-stack-0.9.1 <bacnet-stack-1.4.4 || >=bacnet-stack-1.0.0 <bacnet-stack-1.4.4Fix Suggestion:
Update to version bacnet-stack-1.4.4Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH