CVE-2025-64649: IBM Concert

Medium severity, CVSS 5.9. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• IBM Concert: from 1.0.0, up to and including 2.3.1

Published 2026-08-28. Last modified 2026-09-02.