What is CVE-2024-55909?

CVE-2024-55909 is a medium-severity vulnerability in IBM Concert, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2025-05-02.

How severe is CVE-2024-55909?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in IBM Concert

CVE-2024-55909

IBM Concert Software 1.0.0 through 1.0.5 could allow an authenticated user to cause a denial of service due to the expansion of archive files without controlling resource consumption.

Published 2025-05-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.8th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)

References

www.ibm.com/support/pages/node/7232169 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2024-55909?: CVE-2024-55909 is a medium-severity vulnerability in IBM Concert, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2025-05-02.
How severe is CVE-2024-55909?: Medium severity. CVSS v3 base score is 6.5 out of 10.