Buffer overflow in Teamspeak 3 Server
CVE-2026-4390
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…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (13.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
Affected products
- N/a Teamspeak 3 Server — versions 3.13.0, 3.13.1, 3.13.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (related)
- cna@vuldb.com (related)
- cna@vuldb.com (patch)
Frequently asked questions
- What is CVE-2026-4390?
- CVE-2026-4390 is a medium-severity vulnerability in Teamspeak 3 Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.4/10. Published 2026-05-27.
- How severe is CVE-2026-4390?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2026-4390 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.