CVE-2026-4391
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A heap-based buffer overflow in TeamSpeak 3 Server's ECC key parser allows unauthenticated remote attackers to trigger denial-of-service conditions.
Vulnerability
A heap-based buffer overflow vulnerability exists in the ECC key parser of TeamSpeak 3 Server versions up to 3.13.7 [1]. This affects the unknown code handling ECC keys, allowing specially crafted network input to overflow a heap buffer. The vulnerability is exploitable remotely without authentication (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Exploitation
An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted ECC key to the server [1]. No authentication or user interaction is required; the attack is launched over the network by triggering the vulnerable code path during key parsing.
Impact
Successful exploitation leads to denial-of-service conditions, including service instability or server restarts [1]. There is no impact on confidentiality or integrity (CVSS: N/I). The heap-based buffer overflow may corrupt memory, causing the server to crash or become unresponsive.
Mitigation
TeamSpeak recommends upgrading to TeamSpeak 3 Server version 3.13.8, which fixes this vulnerability [1]. No workarounds have been provided; updating affected deployments is the only mitigation. The vulnerability is not known to be exploited in the wild, nor is it listed in CISA's Known Exploited Vulnerabilities Catalog.
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
1- 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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