NULL Pointer Dereference in BACnet Stack for Embedded Systems
CVE-2026-45341

7.5HIGH

Key Information:

Vendor

Bacnet-stack

Status
Bacnet-stack
Vendor
CVE Published:
12 November 2026

What is CVE-2026-45341?

The BACnet Stack, an open-source protocol stack for embedded systems, suffers from a NULL pointer dereference vulnerability located in the bacnet_device_object_reference_decode() function. This issue occurs when handling a WriteProperty request that updates OBJECT_STRUCTURED_VIEW or PROP_SUBORDINATE_LIST. The flaw affects versions ranging from 1.4.0 to just before 1.4.4, as well as from 1.5.0 to before 1.5.1. Users are advised to upgrade to versions 1.4.4 or 1.5.1, where the issue has been patched.

Affected Version(s)

bacnet-stack >= 1.4.0, < 1.4.4 < 1.4.0, 1.4.4

bacnet-stack >= 1.5.0, < 1.5.1 < 1.5.0, 1.5.1

References

https://github.com/bacnet-stack/bacnet-stack/security/adv...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.