Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since July 15, 2026.
CVE-2023-4346
KNX Protocol Connection Authorization Option 1 vulnerability
Added to KEV July 15, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2023-4346
- CWE
- CWE-645
- Affected products
- KNX Protocol Connection Authorization Option 1 · KNX Association KNX Protocol Connection Authorization Option 1 · KNX Association
What happened
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.
What it means for your business
KNX Association KNX Protocol Connection Authorization Option 1 is listed in CISA's Known Exploited Vulnerabilities catalog (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. CISA remediation due date: 2026-07-29. PremierePC tracks KEV alerts for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Required action
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.
CISA due date: July 29, 2026
Sources
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