Medium 5.3Published May 27, 2026

CVE-2026-4391TeamSpeak 3 Server ECC Key heap-based overflow

Updated under an hour ago (Oct 26, 2026, 7:30 PM ET)

Does this affect you?

It affects n/a TeamSpeak 3 Server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for n/a TeamSpeak 3 Server

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-122, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: May 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a TeamSpeak 3 Server teamspeak_3_server: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; and 1 more ranges	CNA record

References

References

https://vuldb.com/vuln/366315	vdb-entry
https://vuldb.com/vuln/366315/cti	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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.