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CVE-2023-4346

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

7.5
CVSS
0.9%
EPSS (exploit prob.)
56.2%
EPSS percentile
Yes
Actively exploited
No
Ransomware use
2026-07-15
Added

Summary

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.

Affected software

Vendor: KNX Association  ·  Product: KNX Protocol Connection Authorization Option 1

Weakness types (CWE):

CWE-645

What to do

This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.

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All information is aggregated from public sources for awareness only and does not constitute an accusation or a security assessment. No personal data or credentials are published.