PT-2026-30923 · Softethervpn · Softether Vpn

Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-39312

Mitre

CVSS v3.1

7.5

High

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-39312

Affected Products

Softether Vpn

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-39312 · Security Note
• https://github.com/SoftEtherVPN/SoftEtherVPN/security/advisories/GHSA-q5g3-qhc6-pr3h · Note