CVE-2026-4390

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

A weakness has been identified in TeamSpeak 3 Server up to 3.13.7. This affects the function process_resend_queue of the component Connection State Management. This manipulation causes use after free. The attack may be initiated remotely. Upgrading to version 3.13.8 is able to mitigate this issue. The affected component should be upgraded.

Published 2026-05-27. Last modified 2026-06-17.