{"id":"CVE-2023-22308","aliases":["EUVD-2023-26471","GHSA-8x86-h5jc-fg6v"],"status":"published","title":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of...","description":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00841,"percentile":0.58331,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-191"],"published":"2023-10-12T15:27:54Z","modified":"2026-06-17T05:35:00Z","products":[{"vendor":"softether","product":"vpn"},{"vendor":"softether vpn","product":"softether vpn"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2023-1737","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1737"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-22308"},{"url":"https://github.com/advisories/GHSA-8x86-h5jc-fg6v"}],"sources":{"cve":[{"id":"CVE-2023-22308","description":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.","status":"published","published":"2023-10-12T15:27:54.061Z","modified":"2024-08-02T10:07:06.157Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:35:15.779187Z"}],"euvd":[{"id":"EUVD-2023-26471","description":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.","status":"published","published":"2023-10-12T15:27:54Z","modified":"2024-08-02T10:07:06Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T03:50:07.959006Z"}],"ghsa":[{"id":"GHSA-8x86-h5jc-fg6v","title":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of...","description":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.","status":"published","published":"2023-10-12T18:30:28Z","modified":"2024-04-04T08:35:44Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:56:59.652212Z"}],"nvd":[{"id":"CVE-2023-22308","description":"An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.","status":"published","published":"2023-10-12T16:15:09.967Z","modified":"2026-06-17T05:35:00.653Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:08:37.83429Z"}]}}