What is CVE-2026-6544?

CVE-2026-6544 is a medium-severity vulnerability in IBM Concert, classified under Files or Directories Accessible to External Parties. CVSS score: 6.2/10. Published 2026-09-24.

How severe is CVE-2026-6544?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in IBM Concert

CVE-2026-6544

IBM Concert 1.0.0 through 3.0.0 allows recursive copying of directories without proper controls which can lead to unintentional inclusion of sensitive or unnecessary files and increased attack surface.

Published 2026-09-24 · last modified 2026-09-28.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.7th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

IBM Concert

Weakness classification (CWE)

CWE-552 — Files or Directories Accessible to External Parties

References

www.ibm.com/support/pages/node/7288830 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-6544?: CVE-2026-6544 is a medium-severity vulnerability in IBM Concert, classified under Files or Directories Accessible to External Parties. CVSS score: 6.2/10. Published 2026-09-24.
How severe is CVE-2026-6544?: Medium severity. CVSS v3 base score is 6.2 out of 10.