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TeamSpeak 3 Server CVE-2026-4390

| EUVD-2026-32580 MEDIUM
Buffer Overflow (CWE-119)
2026-05-27 cna@vuldb.com GHSA-cr8m-87qj-3732
Buffer Overflow Denial Of Service
5.3
CVSS 4.0
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CVSS VectorNVD

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
May 27, 2026 - 21:05 vuln.today

DescriptionNVD

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.

AnalysisAI

Use-after-free in TeamSpeak 3 Server versions 3.13.0 through 3.13.7 allows a low-privileged remote attacker to corrupt server memory via the process_resend_queue function within Connection State Management, resulting in limited integrity and availability impact. Discovered and disclosed by modzero.com (advisory MZ-26-01) and acknowledged by TeamSpeak via official security advisory TS-SA-2026-001, the vendor has released version 3.13.8 as the fix. …

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CVE-2026-4390 vulnerability details – vuln.today
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