Vulnerability · Published May 27, 2026 · Assigned by VulDB
CVE-2026-4391TeamSpeak 3 Server ECC Key heap-based overflow
Medium 5.3
In plain English
A medium-severity heap buffer overflow in TeamSpeak 3 Server. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 63.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A security vulnerability has been detected in TeamSpeak 3 Server up to 3.13.7. This vulnerability affects unknown code of the component ECC Key Parser. Such manipulation leads to heap-based buffer overflow. The attack may be launched remotely. Upgrading to version 3.13.8 is able to resolve this issue. It is suggested to upgrade the affected component.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | TeamSpeak 3 Server | 3.13.03.13.13.13.23.13.33.13.43.13.53.13.63.13.7 |
Weakness: CWE-122, CWE-119 · 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
References
- VDB-366315 | TeamSpeak 3 Server ECC Key heap-based overflow vdb-entry
- VDB-366315 | CTI Indicators (IOB, IOC) 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