CVE-2026-4390 | TeamSpeak 3 Server up to 3.13.7 Connection State Management process_resend_queue use after free (MZ-26-01)

A vulnerability has been found in TeamSpeak 3 Server up to 3.13.7 and classified as critical. This affects the function process_resend_queue of the component Connection State Management. This manipulation causes use after free.

This vulnerability appears as CVE-2026-4390. The attack may be initiated remotely. There is no available exploit.

The affected component should be upgraded.