CVE-2026-4391
Deferred Deferred - Pending Action
Heap-based Buffer Overflow in TeamSpeak 3 Server

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: VulDB

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.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-17
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
teamspeak teamspeak_3_server to 3.13.7 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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Executive Summary

This vulnerability exists in TeamSpeak 3 Server versions up to 3.13.7, specifically in the ECC Key Parser component. It allows an attacker to cause a heap-based buffer overflow by manipulating unknown code within this component. The attack can be launched remotely.

Upgrading to version 3.13.8 resolves this issue.

Impact Analysis

The heap-based buffer overflow caused by this vulnerability can potentially allow an attacker to execute arbitrary code or cause a denial of service on the affected TeamSpeak 3 Server. Since the attack can be launched remotely without authentication, it poses a significant security risk.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade the TeamSpeak 3 Server to version 3.13.8 or later.

This upgrade resolves the heap-based buffer overflow issue in the ECC Key Parser component.

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