Home

Description

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.

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




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
MEDIUM: 5.4CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
5.5AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:C

Problem types

Use After Free

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/366314 (VDB-366314 | TeamSpeak 3 Server Connection State Management process_resend_queue use after free) vdb-entry technical-description

vuldb.com/vuln/366314/cti (VDB-366314 | CTI Indicators (IOB, IOC, IOA)) 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-2026-4390)

nvd.nist.gov (CVE-2026-4390)

Download JSON