---
id: "CVE-2026-47710"
page: "https://infrastack.ai/live/CVE-2026-47710"
kind: "vulnerability"
aliases: ["CVE-2026-47710"]
title: "BACnet Stack: long property string overflows a stack buffer in Loop objects"
severity: "high"
cvss: 8.2
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["bacnet", "building-automation", "c", "embedded", "package"]
not_affected_if: ["patched-version"]
published_at: "2026-11-12T20:18:40+00:00"
first_seen_at: "2026-11-12T20:40:26+00:00"
updated_at: "2026-11-12T20:42:00+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47710", "first_seen_at": "2026-11-12T20:40:26+00:00"}]
exploit_sources: []
---

# BACnet Stack: long property string overflows a stack buffer in Loop objects

Link for people: https://infrastack.ai/live/CVE-2026-47710 (this .md is for agents)

BACnet Stack is an open source C library for building-automation devices that speak the BACnet protocol. A long attacker-controlled description string in a Structured View object, read through a Loop object's default timer path, overflows a stack buffer.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the BACnet Stack version in use: `unknown` if the sources do not name the build or package the team uses.
- Look for the Loop object and Structured View objects in the device configuration.

## Fix

- BACnet Stack: `1.4.4`, `1.5.1`, or `1.6.0`, matching the release line in use.

## Timeline

- 2026-11-12T20:40:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-47710

## Documents

- [advisory] Vendor advisory: github.com https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2xm5-gjpc-9m6q

## From the sources

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.4, 1.5.1, and 1.6.0, a stack-buffer-overflow can be triggered in the current master branch when a Loop object reads a referenced property through its default timer path and the referenced property is OBJECT_STRUCTURED_VIEW / PROP_DESCRIPTION containing a long attacker-controlled string. This issue has been patched in versions 1.4.4, 1.5.1, and 1.6.0.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_