CVE-2026-4390
Deferred Deferred - Pending Action
Use After Free in TeamSpeak 3 Server

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: VulDB

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.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-15
NVD
EUVD
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
teamspeak teamspeak_3_server to 3.13.7 (inc)
teamspeak teamspeak_3_server 3.13.8
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-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Compliance Impact

The provided information does not specify how the vulnerability in TeamSpeak 3 Server up to version 3.13.7 impacts compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability is a weakness in TeamSpeak 3 Server versions up to 3.13.7, specifically in the process_resend_queue function of the Connection State Management component. It involves a use after free issue, which means that the software attempts to use memory after it has been freed, potentially leading to unexpected behavior or crashes. The attack exploiting this vulnerability can be initiated remotely.

Upgrading to version 3.13.8 of TeamSpeak 3 Server mitigates this issue.

Impact Analysis

This vulnerability can lead to instability or crashes in the TeamSpeak 3 Server due to the use after free condition. Since the attack can be initiated remotely, an attacker might exploit this weakness to disrupt service availability or potentially execute further malicious actions depending on the context of the use after free.

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 addresses the use after free issue in the process_resend_queue function of the Connection State Management component.

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