{"id":"CVE-1999-1463","aliases":["EUVD-1999-1444","GHSA-rp7x-gfhv-xmq5"],"status":"published","title":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a...","description":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.16615,"percentile":0.97036,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"1997-07-10T04:00:00Z","modified":"2026-06-16T21:50:29Z","products":[{"vendor":"microsoft","product":"windows_nt"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/528","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/7219","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Exploit","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-1463"},{"url":"https://github.com/advisories/GHSA-rp7x-gfhv-xmq5"}],"sources":{"cve":[{"id":"CVE-1999-1463","description":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.","status":"published","published":"2001-09-12T04:00:00Z","modified":"2024-08-01T17:18:07.37Z","updated_at":"2026-11-02T14:33:53.295018Z"}],"euvd":[{"id":"EUVD-1999-1444","description":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.","status":"published","published":"2001-09-12T04:00:00Z","modified":"2024-08-01T17:18:07Z","updated_at":"2026-11-03T03:50:42.451061Z"}],"ghsa":[{"id":"GHSA-rp7x-gfhv-xmq5","title":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a...","description":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.","status":"published","published":"2022-04-30T18:12:30Z","modified":"2023-01-30T05:04:46Z","updated_at":"2026-11-02T14:47:07.288055Z"}],"nvd":[{"id":"CVE-1999-1463","description":"Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.","status":"published","published":"1997-07-10T04:00:00Z","modified":"2026-06-16T21:50:29.653Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T13:58:19.254283Z"}]}}