CVE-2026-4390: Use After Free in TeamSpeak 3 Server
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.
AI Analysis
Technical Summary
CVE-2026-4390 is a use-after-free vulnerability in TeamSpeak 3 Server affecting versions 3.13.0 through 3.13.7. The flaw resides in the process_resend_queue function of the Connection State Management component, allowing remote attackers to manipulate memory after it has been freed. This can cause instability or potentially enable further exploitation. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity. The vendor has released version 3.13.8 which addresses this issue.
Potential Impact
Successful exploitation of this vulnerability may lead to use-after-free conditions, which can cause application crashes or potentially allow attackers to execute arbitrary code or disrupt service. The CVSS score of 5.3 reflects a medium severity with network attack vector, low attack complexity, and no user interaction required. Privileges required are low, and the vulnerability impacts confidentiality, integrity, and availability to a limited extent.
Mitigation Recommendations
Upgrade TeamSpeak 3 Server to version 3.13.8 or later, as this version contains the fix for the use-after-free vulnerability in the process_resend_queue function. No other mitigation steps are indicated or required according to the available data.
CVE-2026-4390: Use After Free in TeamSpeak 3 Server
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.
CVSS v4.0
Score 5.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4390 is a use-after-free vulnerability in TeamSpeak 3 Server affecting versions 3.13.0 through 3.13.7. The flaw resides in the process_resend_queue function of the Connection State Management component, allowing remote attackers to manipulate memory after it has been freed. This can cause instability or potentially enable further exploitation. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity. The vendor has released version 3.13.8 which addresses this issue.
Potential Impact
Successful exploitation of this vulnerability may lead to use-after-free conditions, which can cause application crashes or potentially allow attackers to execute arbitrary code or disrupt service. The CVSS score of 5.3 reflects a medium severity with network attack vector, low attack complexity, and no user interaction required. Privileges required are low, and the vulnerability impacts confidentiality, integrity, and availability to a limited extent.
Mitigation Recommendations
Upgrade TeamSpeak 3 Server to version 3.13.8 or later, as this version contains the fix for the use-after-free vulnerability in the process_resend_queue function. No other mitigation steps are indicated or required according to the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-03-18T15:05:50.926Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a172e7fe29bf47b50d78ab8
Added to database: 5/27/2026, 5:48:47 PM
Last enriched: 5/27/2026, 6:04:44 PM
Last updated: 5/27/2026, 6:52:09 PM
Views: 3
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