What is CVE-2025-64649?

CVE-2025-64649 is a medium-severity vulnerability in IBM Concert, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2026-08-28.

How severe is CVE-2025-64649?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in IBM Concert

CVE-2025-64649

IBM Concert 1.0.0 through 2.3.1 could allow a remote attacker to perform unauthorized actions using man in the middle techniques due to improper certificate validation.

Vulnerability class: Improper Certificate Validation

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Ibm Concert

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2025-64649?: CVE-2025-64649 is a medium-severity vulnerability in IBM Concert, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2026-08-28.
How severe is CVE-2025-64649?: Medium severity. CVSS v3 base score is 5.9 out of 10.