Security Advisory

CVE-2026-39312

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-04-07 16:52:08

Last updated 2026-04-07 17:27:16

Assigner GitHub_M

State PUBLISHED

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.

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