CVE-2026-4390

TeamSpeak 3 Server Connection State Management process_resend_queue use after free

State: Published
Severity: 5.3 Medium
Published: May 27, 2026
Updated: May 27, 2026
Reserved: Mar 18, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C	VulDB
3.0	5.4 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C	VulDB
2.0	5.5 Medium	AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-416 Use After Free
CWE-119 Memory Corruption

Affected Products

Product	Versions
TeamSpeak 3 Servern/a	3.13.0Affected 3.13.1Affected 3.13.2Affected 3.13.3Affected 3.13.4Affected 3.13.5Affected 3.13.6Affected 3.13.7Affected 3.13.8Not affected

References

VDB-366314 | TeamSpeak 3 Server Connection State Management process_resend_queue use after freevdb-entrytechnical-description
VDB-366314 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
https://modzero.com/en/advisories/mz-26-01-teamspeak/related
https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.htmlrelated
https://www.teamspeak.com/en/downloads/#serverpatch

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