CVE-2026-4392
TeamSpeak 3 Server clientek Handshake assertion
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
13th
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.
| CWE | CWE-617 |
| Vendor | n/a |
| Product | teamspeak 3 server |
| Published | May 27, 2026 |
| Last Updated | May 28, 2026 |
Stay Ahead of the Next One
Get instant alerts for n/a teamspeak 3 server
Be the first to know when new medium vulnerabilities affecting n/a teamspeak 3 server are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
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
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
n/a / 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
References
vuldb.com: https://vuldb.com/vuln/366316 vuldb.com: https://vuldb.com/vuln/366316/cti modzero.com: https://modzero.com/en/advisories/mz-26-01-teamspeak/ files.teamspeak-services.com: https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.html teamspeak.com: https://www.teamspeak.com/en/downloads/#server
Credits
Michael Imfeld (modzero)