{"id":"CVE-2026-39312","summary":"Pre-Auth EAP-TLS DoS on SoftEther VPN Developer Edition","details":"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.","aliases":["GHSA-q5g3-qhc6-pr3h"],"modified":"2026-07-15T01:49:16.717061138Z","published":"2026-04-07T16:52:08.172Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39312.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39312.json"},{"type":"ADVISORY","url":"https://github.com/SoftEtherVPN/SoftEtherVPN/security/advisories/GHSA-q5g3-qhc6-pr3h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39312"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/softethervpn/softethervpn","events":[{"introduced":"0"},{"last_affected":"10d6efcc5e3329e5a959a99c6e939648f41121bf"}],"database_specific":{"cpe":"cpe:2.3:a:softether:softethervpn:*:*:*:*:developer:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"5.2.5188"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["5.2.5188","5.02.5187","5.02.5186","5.02.5185","5.02.5184","5.02.5183","5.02.5182","5.02.5181","5.02.5180","5.02.0","5.01.9674","5.01.9673","5.01.9672","5.01.9671","5.01.9670","5.01.9669","5.01.9668","5.01.9667","5.01.9666","5.01.9665","5.01.9664","5.01.9663","5.01.9662","5.01.9661","5.01.9660","5.01.9659","5.01.9658"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39312.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}