CVE-2026-39312 — Pre-Auth EAP-TLS DoS on SoftEther VPN Developer Edition
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…
Published: 2026-04-07 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7