Is CVE-2026-39312 actively exploited?

No active exploitation of CVE-2026-39312 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39312 be exploited remotely?

Yes. CVE-2026-39312 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39312?

CVE-2026-39312 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-39312

HIGH

CVE-2026-39312

CWE-789Published: April 7, 2026· Updated: Apr 8, 2026

7.5

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:26.3th

Official Description

SoftEtherVPN is a an open-source cross-platform multi-protocol VPN Program. In 5.2.5188 and earlier, a pre-authentication denial-of-service vulnerability exists in SoftEther VPN Developer Edition 5.2.5188 (and likely earlier versions of Developer Edition). An unauthenticated remote attacker can crash the vpnserver process by sending a single malformed EAP-TLS packet over raw L2TP (UDP/1701), terminating all active VPN sessions.

NVD Source

Technical Analysis

CVE-2026-39312 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.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.