Vulnerability in Knx Connection_authorization
CVE-2023-4346
KNX devices that use KNX Connection Authorization and support Option 1 are, depending on the implementation, vulnerable to being locked and users being unable to reset them to gain access to the device. The BCU key feature on the devices…
EPSS: 0.009 (54.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
References
- ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory, government-resource)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2023-4346?
- CVE-2023-4346 is a high-severity vulnerability in Knx Connection_authorization, classified under CWE-645. CVSS score: 7.5/10. Published 2023-08-29.
- How severe is CVE-2023-4346?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-4346 known to be exploited?
- Yes. CVE-2023-4346 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-07-15), indicating it is being actively exploited.