Is CVE-2026-4392 actively exploited?

No active exploitation of CVE-2026-4392 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4392 be exploited remotely?

Yes. CVE-2026-4392 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4392?

CVE-2026-4392 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-4392

CWE-617Published: May 27, 2026· Updated: May 27, 2026

5.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.1th

Official Description

A vulnerability was detected in TeamSpeak 3 Server up to 3.13.7. This issue affects some unknown processing of the component clientek Handshake Handler. Performing a manipulation of the argument proof results in reachable assertion. Remote exploitation of the attack is possible. Upgrading to version 3.13.8 is capable of addressing this issue. Upgrading the affected component is recommended.

NVD Source

Technical Analysis

CVE-2026-4392 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.