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. Source description excerpt; complete tracked detail loads below.

NVD published: Aug 30, 2023 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

KNX Association — KNX Protocol Connection Authorization Option 1. Product-level identification only; no affected-version conclusion is available from this field.

NVD published: Aug 30, 2023 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

Act · 450.1

Tracker decision tier from the evidence detailed below · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

kev-listed · CISA KEV · VulnCheck KEV · ENISA exploited-vulnerability catalog

CISA KEV added: Jul 15, 2026 · VulnCheck KEV added: Jul 15, 2026 · ENISA added: Jul 15, 2026 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Tracked source remediation field · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026