---
title: "Security digest: August 24, 2023"
url: https://erroneo.us/security/2023-08-24/
description: "August 24, 2023 vulnerability digest: 1 brief (KNX CVE-2023-4346: Building Automation BCU Key…). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2023-08-24
date_modified: 2026-07-15
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: August 24, 2023

1 editorial brief.

## Take stock

- Check exposure: KNX CVE-2023-4346: Building Automation BCU Key Lockout . Owners, facility managers and integrators of KNX building automation (lighting, shutters, HVAC, sensors), especially where a KNX IP interface is reachable from the internet or a shared corporate network.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Editorial briefs

- **Check exposure** [KNX CVE-2023-4346: Building Automation BCU Key Lockout](https://erroneo.us/security/briefs/knx-bcu-key-lockout-cve-2023-4346/index.md): Only buildings with KNX devices that have no BCU key set and a network path to the KNX bus are at risk, but there is no patch and a lockout can mean physically replacing devices.

## Known exploited (CISA KEV)

None.

## Critical advisories

None.

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Source page: https://erroneo.us/security/2023-08-24/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt