{"id":"CVE-1999-0077","aliases":["EUVD-1999-0077","GHSA-j2jv-rjg6-95m2"],"status":"published","title":"Predictable TCP sequence numbers allow spoofing.","description":"Predictable TCP sequence numbers allow spoofing.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.31392,"percentile":0.98292,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"1995-01-01T05:00:00Z","modified":"2026-06-16T21:47:31Z","exploits":[{"source":"exploitdb","id":"EDB-19522","title":"Linux Kernel 2.2 - Predictable TCP Initial Sequence Number","type":"remote","platform":"linux","date":"1999-09-27","verified":true,"url":"https://www.exploit-db.com/exploits/19522"}],"products":[{"vendor":"microsoft","product":"windows_nt"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/139","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-0077"},{"url":"https://github.com/advisories/GHSA-j2jv-rjg6-95m2"}],"sources":{"cve":[{"id":"CVE-1999-0077","description":"Predictable TCP sequence numbers allow spoofing.","status":"published","published":"1999-09-29T04:00:00Z","modified":"2024-08-01T16:27:57.297Z","updated_at":"2026-11-02T14:33:53.60785Z"}],"euvd":[{"id":"EUVD-1999-0077","description":"Predictable TCP sequence numbers allow spoofing.","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-j2jv-rjg6-95m2","title":"Predictable TCP sequence numbers allow spoofing.","description":"Predictable TCP sequence numbers allow spoofing.","status":"published","published":"2022-04-30T18:09:55Z","modified":"2023-01-30T05:04:25Z","updated_at":"2026-11-02T14:47:02.242952Z"}],"nvd":[{"id":"CVE-1999-0077","description":"Predictable TCP sequence numbers allow spoofing.","status":"published","published":"1995-01-01T05:00:00Z","modified":"2026-06-16T21:47:31.603Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T13:58:19.254283Z"}]}}