CVE-2026-4391

TeamSpeak 3 Server ECC Key heap-based overflow

State: Published
Severity: 6.9 Medium
Published: May 27, 2026
Updated: May 27, 2026
Reserved: Mar 18, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	VulDB
3.1	5.3 Medium	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	VulDB
3.0	5.3 Medium	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	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
TeamSpeak 3 Servern/a	3.13.0Affected 3.13.1Affected 3.13.2Affected 3.13.3Affected 3.13.4Affected 3.13.5Affected 3.13.6Affected 3.13.7Affected 3.13.8Not affected

References

VDB-366315 | TeamSpeak 3 Server ECC Key heap-based overflowvdb-entry
VDB-366315 | CTI Indicators (IOB, IOC)signaturepermissions-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

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