---
id: "CVE-2026-47257"
page: "https://infrastack.ai/live/CVE-2026-47257"
kind: "vulnerability"
aliases: ["CVE-2026-47257"]
title: "BACnet Stack: restore logic flaw reachable through server management path"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["bacnet-stack", "building-automation", "embedded", "package"]
not_affected_if: ["default-config", "other-versions"]
published_at: "2026-11-12T20:18:40+00:00"
first_seen_at: "2026-11-12T20:40:26+00:00"
updated_at: "2026-11-12T20:42:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47257", "first_seen_at": "2026-11-12T20:40:26+00:00"}]
exploit_sources: []
---

# BACnet Stack: restore logic flaw reachable through server management path

Link for people: https://infrastack.ai/live/CVE-2026-47257 (this .md is for agents)

BACnet Stack is an open source BACnet protocol C library used in embedded building-automation devices. In versions 1.5.0 and 1.6.0-rc1, a restore logic flaw is reachable through the official apps/server management path when BACNET_BACKUP_RESTORE is enabled, and the sources do not state the attacker outcome beyond that.

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

## How to check

- Check the BACnet Stack version in use against `1.5.0` and `1.6.0-rc1`.
- Check whether the build sets `BACNET_BACKUP_RESTORE` to enabled.
- Check whether the apps/server management path is exposed to untrusted networks.

## Fix

- Move to `1.5.1` or `1.6.0` (the sources state these versions patch the issue).

## Timeline

- 2026-11-12T20:40:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-47257

## Documents

- [advisory] Vendor advisory: github.com https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-x6pp-3pf3-f87r

## From the sources

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. In versions 1.5.0 and 1.6.0-rc1, there is a restore logic flaw in bacnet-stack that is reachable through the official, unmodified apps/server management path when BACNET_BACKUP_RESTORE is enabled. This issue has been patched in versions 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_