Medium 5.3Published May 27, 2026

CVE-2026-4392TeamSpeak 3 Server clientek Handshake assertion

Updated under an hour ago (Oct 26, 2026, 5:50 AM ET)

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It affects n/a TeamSpeak 3 Server. Add what you run to find out whether that includes you.

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Every CVE for n/a TeamSpeak 3 Server

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-617
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: May 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a TeamSpeak 3 Server 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; and 1 more ranges	CNA record

References

https://vuldb.com/vuln/366316vdb-entry, technical-description
https://vuldb.com/vuln/366316/ctisignature, permissions-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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.