{"id":"CVE-1999-0077","title":"Predictable TCP sequence numbers allow spoofing.","summary":"Predictable TCP sequence numbers allow spoofing.","severity":"medium","cvss":5,"cvssVector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","published":"1995-01-01","updated":"2026-06-16","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-1999-0077","references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/139","label":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/139","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","exploit-available"],"epss":0.31392,"epssPercentile":0.98242,"ingestedAt":"2026-06-19T03:39:00.748Z","exploitAvailable":true,"exploits":{"exploitdb":true,"checkedAt":"2026-09-21T15:23:16.157Z"},"slug":"CVE-1999-0077","body":"## Overview\n\nPredictable TCP sequence numbers allow spoofing.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":27.5,"likelihood":6.3,"exploitation":12,"ransomware":0},"changes":[]}