CVE-2026-4390

Medium

Description

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.

SeverityMedium

CVSS5.4

Exploit probability—

ProductTeamspeak 3 Server

PublishedMay 27, 2026

First seenMay 27, 2026

Weakness typeCWE-416Use after free CWE-119Memory buffer bounds error

How to fix

Patches

teamspeak.com/en/downloads/#server

Affected products

Product	Affected versions	Fixed in
teamspeak_3_server teamspeak_3_server	3.13.0, 3.13.1, 3.13.2, 3.13.3, 3.13.4, 3.13.5, 3.13.6, 3.13.7	—

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