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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a TeamSpeak 3 Server affected
Version Status Constraints
3.13.0 affected —
3.13.1 affected —
3.13.2 affected —
3.13.3 affected —
3.13.4 affected —
3.13.5 affected —
3.13.6 affected —
3.13.7 affected —
3.13.8 unaffected —

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Project Subscriptions

Vendors Products
Teamspeak 3 Server Subscribe
Teamspeak 3 Server Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.html cve-icon cve-icon
https://modzero.com/en/advisories/mz-26-01-teamspeak/ cve-icon cve-icon
https://vuldb.com/vuln/366316 cve-icon cve-icon
https://vuldb.com/vuln/366316/cti cve-icon cve-icon
https://www.teamspeak.com/en/downloads/#server cve-icon cve-icon
History

Wed, 27 May 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title TeamSpeak 3 Server clientek Handshake assertion
First Time appeared Teamspeak 3 Server
Teamspeak 3 Server teamspeak 3 Server
Weaknesses CWE-617
CPEs cpe:2.3:a:teamspeak_3_server:teamspeak_3_server:*:*:*:*:*:*:*:*
Vendors & Products Teamspeak 3 Server
Teamspeak 3 Server teamspeak 3 Server
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}

cvssV3_1

{'score': 5.3, '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'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-05-27T17:00:09.695Z

Reserved: 2026-03-18T15:06:05.814Z

Link: CVE-2026-4392

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-27T18:16:28.763

Modified: 2026-05-27T18:16:28.763

Link: CVE-2026-4392

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-27T19:30:35Z

Weaknesses