{"id":"CVE-2023-5593","aliases":["EUVD-2023-57886","GHSA-85wf-77c7-2h37"],"status":"published","title":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software...","description":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00216,"percentile":0.12175,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2023-11-20T12:03:16Z","modified":"2026-06-17T06:48:54Z","products":[{"vendor":"zyxel","product":"secuextender ssl vpn client"},{"vendor":"zyxel","product":"secuextender_ssl_vpn"}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-secuextender-ssl-vpn-client-software","tags":["vendor-advisory","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5593"},{"url":"https://github.com/advisories/GHSA-85wf-77c7-2h37"}],"sources":{"cve":[{"id":"CVE-2023-5593","description":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.","status":"published","published":"2023-11-20T12:03:16.224Z","modified":"2024-08-29T20:47:54.253Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:35:17.149492Z"}],"euvd":[{"id":"EUVD-2023-57886","description":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.","status":"published","published":"2023-11-20T12:03:16Z","modified":"2024-08-29T20:47:54Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:56:07.010485Z"}],"ghsa":[{"id":"GHSA-85wf-77c7-2h37","title":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software...","description":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.","status":"published","published":"2023-11-20T12:30:27Z","modified":"2023-11-20T12:30:33Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:55:04.479575Z"}],"nvd":[{"id":"CVE-2023-5593","description":"The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.","status":"published","published":"2023-11-20T12:15:09.18Z","modified":"2026-06-17T06:48:54.55Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:08:47.966245Z"}]}}