---
id: CVE-1999-0116
title: >-
  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.
summary: >-
  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: medium
cvss: 5
cvssVector: 'AV:N/AC:L/Au:N/C:N/I:N/A:P'
published: '1996-09-19'
updated: '2026-06-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-1999-0116'
references:
  - url: 'ftp://patches.sgi.com/support/free/security/advisories/19961202-01-PX'
    label: cve@mitre.org
  - url: 'http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/136'
    label: cve@mitre.org
  - url: 'ftp://patches.sgi.com/support/free/security/advisories/19961202-01-PX'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/136'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - exploit-available
epss: 0.05621
epssPercentile: 0.92594
ingestedAt: '2026-06-22T15:59:08.108Z'
exploitAvailable: true
exploits:
  exploitdb: true
  checkedAt: '2026-09-23T07:13:14.406Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.