CVE-2026-4391

Name of the Vulnerable Software and Affected Versions TeamSpeak 3 Server versions prior to 3.13.9

Description A heap-based buffer overflow exists in the ECC Key Parser component. This issue allows unauthenticated remote attackers to crash the server during the connection handshake by providing specially crafted input. A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially leading to memory corruption or application crashes.

Recommendations Update to version 3.13.9.