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CVE

CWE

Training

CVE-2026-4392

Published: May 27, 2026

Modified: May 28, 2026

PUBLISHED

CVSS v3.1

5.3

MEDIUM

Description

A vulnerability was detected in TeamSpeak 3 Server up to 3.13.7. This issue affects some unknown processing of the component clientek Handshake Handler. Performing a manipulation of the argument proof results in reachable assertion. Remote exploitation of the attack is possible. Upgrading to version 3.13.8 is capable of addressing this issue. Upgrading the affected component is recommended.

Vendor	Product	Versions
n/a	TeamSpeak 3 Server	affected `3.13.0` affected `3.13.1` affected `3.13.2` affected `3.13.3` affected `3.13.4` +4 more versions

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

VDB-366316 | TeamSpeak 3 Server clientek Handshake assertion

vdb-entry

technical-description

VDB-366316 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

https://modzero.com/en/advisories/mz-26-01-teamspeak/

related

https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.html

related

https://www.teamspeak.com/en/downloads/#server

patch

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