CVE-2026-4390
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A use-after-free in TeamSpeak 3 Server's connection state management allows authenticated remote attackers to cause denial-of-service via specially crafted requests.
Vulnerability
A use-after-free vulnerability exists in the process_resend_queue function of TeamSpeak 3 Server's Connection State Management component. Affected versions are 3.13.7 and below. The bug occurs when inconsistent connection state handling leads to a use-after-free condition, which can be triggered remotely by an authenticated attacker [1].
Exploitation
An attacker needs low-privileged authenticated access to the server. By sending specially crafted network requests that manipulate connection state transitions, the attacker can trigger the use-after-free. No user interaction is required [1].
Impact
Successful exploitation results in denial-of-service conditions, including service instability or server restarts. The CVSS vector indicates low integrity impact, but the primary consequence is availability loss [1].
Mitigation
TeamSpeak has released version 3.13.8 of TeamSpeak 3 Server, which fixes this vulnerability. Users should upgrade immediately. No workarounds are available [1].
AI Insight generated on May 27, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: <=3.13.7
- Range: <=3.13.7
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
5News mentions
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