---
id: "CVE-2026-104204"
page: "https://infrastack.ai/live/CVE-2026-104204"
kind: "vulnerability"
aliases: ["CVE-2026-104204"]
title: "BACnet Stack: Structured View flaw lets a server be knocked offline"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["bacnet", "building-automation", "c", "embedded", "package"]
not_affected_if: ["no-bacnet-server", "structured-view-disabled"]
published_at: "2026-11-13T19:17:37+00:00"
first_seen_at: "2026-11-13T19:52:09+00:00"
updated_at: "2026-11-13T19:54:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104204", "first_seen_at": "2026-11-13T19:52:09+00:00"}]
exploit_sources: []
---

# BACnet Stack: Structured View flaw lets a server be knocked offline

Link for people: https://infrastack.ai/live/CVE-2026-104204 (this .md is for agents)

BACnet Stack is a C library for building BACnet building-automation devices. Before version 1.6.1, a crafted request to the Structured View object implementation can crash or stall the server, causing denial of service.

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

## How to check

- Check the BACnet Stack version in your build or vendored sources, for example `grep -i version` on the library's version header.
- Confirm whether your device or application enables the Structured View object.

## Fix

- BACnet Stack: upgrade to `1.6.1` or `1.7.0`.

## Timeline

- 2026-11-13T19:52:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104204

## Documents

- [advisory] Vendor advisory: github.com https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-hg85-pmm3-jfcf

## From the sources

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to version 1.6.1, there is a server-side denial-of-service issue affecting the Structured View object implementation. This issue has been patched in versions 1.6.1 and 1.7.0.

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