Buffer overflow in Teamspeak 3 Server

CVE-2026-4391

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 remot…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (17.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

  • N/a Teamspeak 3 Server — versions 3.13.0, 3.13.1, 3.13.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4391?
CVE-2026-4391 is a medium-severity vulnerability in Teamspeak 3 Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-05-27.
How severe is CVE-2026-4391?
Medium severity. CVSS v3 base score is 5.3 out of 10.