{"id":"CVE-2023-27395","aliases":["EUVD-2023-31171","GHSA-33mh-qwc8-jxxx"],"status":"published","title":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality...","description":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01543,"percentile":0.75322,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2023-10-12T15:27:54Z","modified":"2026-06-17T05:44:56Z","products":[{"vendor":"softether","product":"vpn"},{"vendor":"softether vpn","product":"softether vpn"},{"vendor":"softether_vpn","product":"softether_vpn"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2023-1735","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.softether.org/9-about/News/904-SEVPN202301","tags":["x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1735"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27395"},{"url":"https://github.com/advisories/GHSA-33mh-qwc8-jxxx"}],"sources":{"cve":[{"id":"CVE-2023-27395","description":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2023-10-12T15:27:54.988Z","modified":"2024-08-02T12:09:43.368Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:35:26.261013Z"}],"euvd":[{"id":"EUVD-2023-31171","description":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2023-10-12T15:27:54Z","modified":"2024-08-02T12:09:43Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T03:50:06.256765Z"}],"ghsa":[{"id":"GHSA-33mh-qwc8-jxxx","title":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality...","description":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2023-10-12T18:30:28Z","modified":"2024-04-04T08:35:53Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:56:59.652212Z"}],"nvd":[{"id":"CVE-2023-27395","description":"A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2023-10-12T16:15:11.583Z","modified":"2026-06-17T05:44:56.68Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:08:37.83429Z"}]}}