CVE-2024-4009

CRITICALNVD 9.29.2—

9.2

Replay Attack

in ABB, Busch-Jaeger, FTS Display (version 1.00) and BCU (version 1.3.0.33) allows attacker to capture/replay KNX telegram to local KNX Bus-System

CVSS v3: 9.2
EG Score: 9.2(medium)
EPSS: 31.5%
KEV: Not listed

Published

June 5, 2024

Last Modified

March 27, 2025

References (2)

cybersecurity@chhttps://search.abb.com/library/Download.aspx?DocumentID=9AKK108464A0803&LanguageCode=en&DocumentPartId=&Action=Launch
af854a3a-2127-422b-91ae-364da2661108https://search.abb.com/library/Download.aspx?DocumentID=9AKK108464A0803&LanguageCode=en&DocumentPartId=&Action=Launch

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-294Authentication Bypass by Capture-replay

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 00:34 UTCEG score recompute
2026-05-24 00:34 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2024-4009?

CVE-2024-4009 is a critical vulnerability published on June 5, 2024. Replay Attack in ABB, Busch-Jaeger, FTS Display (version 1.00) and BCU (version 1.3.0.33) allows attacker to capture/replay KNX telegram to local KNX Bus-System

When was CVE-2024-4009 disclosed?

CVE-2024-4009 was first published in the National Vulnerability Database on June 5, 2024, with the most recent update on March 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-4009 actively exploited?

CVE-2024-4009 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-4009?

CVE-2024-4009 has a CVSS v3 base score of 9.2 (NVD).

How do I remediate CVE-2024-4009?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-4009, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2024-4009

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-4009?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)