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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.

PUBLISHED Reserved 2026-03-18 | Published 2026-05-27 | Updated 2026-05-27 | Assigner VulDB




MEDIUM: 6.9CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
5.0AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C

Problem types

Heap-based Buffer Overflow

Memory Corruption

Timeline

2026-05-27:Advisory disclosed
2026-05-27:VulDB entry created
2026-05-27:VulDB entry last update

Credits

Michael Imfeld (modzero) finder

References

vuldb.com/vuln/366315 (VDB-366315 | TeamSpeak 3 Server ECC Key heap-based overflow) vdb-entry

vuldb.com/vuln/366315/cti (VDB-366315 | CTI Indicators (IOB, IOC)) signature permissions-required

modzero.com/en/advisories/mz-26-01-teamspeak/ related

files.teamspeak-services.com/...security/TS-SA-2026-001.html related

www.teamspeak.com/en/downloads/ patch

cve.org (CVE-2026-4391)

nvd.nist.gov (CVE-2026-4391)

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