Medium 5.4Published May 27, 2026

CVE-2026-4390TeamSpeak 3 Server Connection State Management process_resend_queue use after free

Updated under an hour ago (Oct 28, 2026, 4:50 AM ET)

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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.

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Every CVE for n/a TeamSpeak 3 Server

Exploited in the last 30 days

A weakness has been identified in TeamSpeak 3 Server up to 3.13.7. This affects the function process_resend_queue of the component Connection State Management. This manipulation causes use after free. The attack may be initiated remotely. Upgrading to version 3.13.8 is able to mitigate this issue. The affected component should be upgraded.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
Weakness (CWE): CWE-416, 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/366314	vdb-entry, technical-description
https://vuldb.com/vuln/366314/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.