{"id":"CVE-1999-0116","aliases":["EUVD-1999-0116","GHSA-j56q-jrrm-mwmf"],"status":"published","title":"Denial of service when an attacker sends many SYN packets to create multiple connections without...","description":"Denial of service when an attacker sends many SYN packets to create multiple connections without ever sending an ACK to complete the connection, aka SYN flood.","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":"2026-11-08","score":0.05621,"percentile":0.92994,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"1996-09-19T04:00:00Z","modified":"2026-06-16T21:47:37Z","exploits":[{"source":"exploitdb","id":"EDB-343","title":"TCP SYN - 'bang.c' Denial of Service","type":"dos","platform":"bsd","date":"2002-09-17","verified":true,"url":"https://www.exploit-db.com/exploits/343"}],"products":[{"vendor":"ibm","product":"aix"},{"vendor":"ibm","product":"sng"}],"references":[{"url":"http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll\u0026doc=secbull/136","tags":["vendor-advisory","x_refsource_SUN","x_transferred"]},{"url":"ftp://patches.sgi.com/support/free/security/advisories/19961202-01-PX","tags":["vendor-advisory","x_refsource_SGI","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-0116"},{"url":"https://github.com/advisories/GHSA-j56q-jrrm-mwmf"}],"sources":{"cve":[{"id":"CVE-1999-0116","description":"Denial of service when an attacker sends many SYN packets to create multiple connections without ever sending an ACK to complete the connection, aka SYN flood.","status":"published","published":"1999-09-29T04:00:00Z","modified":"2024-08-01T16:27:57.689Z","updated_at":"2026-11-02T14:33:53.911988Z"}],"euvd":[{"id":"EUVD-1999-0116","description":"Denial of service when an attacker sends many SYN packets to create multiple connections without ever sending an ACK to complete the connection, aka SYN flood.","status":"published","published":"1999-09-29T04:00:00Z","modified":"2024-08-01T16:27:57Z","updated_at":"2026-11-03T03:50:48.358727Z"}],"ghsa":[{"id":"GHSA-j56q-jrrm-mwmf","title":"Denial of service when an attacker sends many SYN packets to create multiple connections without...","description":"Denial of service when an attacker sends many SYN packets to create multiple connections without ever sending an ACK to complete the connection, aka SYN flood.","status":"published","published":"2022-05-03T03:06:01Z","modified":"2023-02-01T05:00:57Z","updated_at":"2026-11-02T14:49:37.776792Z"}],"nvd":[{"id":"CVE-1999-0116","description":"Denial of service when an attacker sends many SYN packets to create multiple connections without ever sending an ACK to complete the connection, aka SYN flood.","status":"published","published":"1996-09-19T04:00:00Z","modified":"2026-06-16T21:47:37.367Z","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"}]}}