KNX Association KNX Protocol Connection Authorization Option 1 Overly Restrictive Account Lockout Mechanism Vulnerability

KNX Association KNX Protocol Connection Authorization Option 1

KNX Association KNX Protocol Connection Authorization Option 1 contains an overly restrictive account lockout mechanism vulnerability that could allow an attacker to purge all devices without additional security options enabled and set a BCU key to lock the device. Added to CISA KEV on 2026-07-15 (federal deadline 2026-07-29).

First seen: 15 Jul 2026
Last update: 15 Jul 2026, 12:00 UTC
Identifiers: CVE-2023-4346
Source: CISA KEV

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## KNX Association KNX Protocol Connection Authorization Option 1 Overly Restrictive Account Lockout Mechanism Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: KNX Association KNX Protocol Connection Authorization Option 1
Ids: CVE-2023-4346

KNX Association KNX Protocol Connection Authorization Option 1 contains an overly restrictive account lockout mechanism vulnerability that could allow an attacker to purge all devices without additional security options enabled and set a BCU key to lock the device. Added to CISA KEV on 2026-07-15 (federal deadline 2026-07-29).

## Steps
1. Search the repo, its CI and infra config for KNX Association KNX Protocol Connection Authorization Option 1. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2023-4346") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2023-4346 https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01
https://pwned.coffee/i/knx-association-knx-protocol-connection-authorization-op-cve-2023-4346

Sources

Totalone hot coffee