Heap-Based Buffer Overflow in TeamSpeak 3 Server by TeamSpeak
CVE-2026-4391

6.9MEDIUM

Key Information:

Vendor

TeamSpeak

Status
Teamspeak 3 Server
Vendor
CVE Published:
27 May 2026

What is CVE-2026-4391?

A security vulnerability has been identified in TeamSpeak 3 Server versions up to 3.13.7, stemming from an issue within the ECC Key Parser component. Attackers can exploit this vulnerability, potentially leading to a heap-based buffer overflow, which could be triggered remotely. Users are strongly advised to upgrade to version 3.13.8 to mitigate these risks and ensure the security of their system.

Affected Version(s)

TeamSpeak 3 Server 3.13.0

TeamSpeak 3 Server 3.13.1

TeamSpeak 3 Server 3.13.2

References

https://vuldb.com/vuln/366315
vdb-entry
https://vuldb.com/vuln/366315/cti
signaturepermissions-required
https://modzero.com/en/advisories/mz-26-01-teamspeak/
related

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michael Imfeld (modzero)
.