{"schema":"threatline.record/2","record":{"id":"CVE-2023-4346","aliases":[],"summary":"KNX Association KNX Protocol Connection Authorization Option 1 Overly Restrictive Account Lockout Mechanism Vulnerability","details":"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. ","categories":["Unclassified"],"product":"KNX Protocol Connection Authorization Option 1","vendor":"KNX Association","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-4346","source_modified_at":"2026-07-16T03:55:23.364Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"KNX Protocol Connection Authorization Option 1","vendor":"KNX Association","versions":[{"status":"affected","version":"0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":7.5,"severity":"High","kev":{"listed":true,"date_added":"2026-07-15","due_date":"2026-07-29","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.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.01294,"percentile":0.70107,"score_date":"2026-10-23"},"published_at":"2023-08-29T19:38:55.399Z","modified_at":"2026-07-16T03:55:23.364Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2023-4346","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-07-16T03:55:23.364Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2023-4346","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01","tags":["government-resource","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4346","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4346","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"partial","assessed_at":"2026-07-15T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-07-16T03:55:23.364Z","content_hash":"8aa27704a1250790830bd543af3e7649003d5ad83193db650d48c3d03f103954"}}