{"id":"CVE-2001-0751","aliases":["EUVD-2001-0736","GHSA-v59f-9wq8-3hgg"],"status":"published","title":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence...","description":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.02594,"percentile":0.85407,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2001-10-18T04:00:00Z","modified":"2026-06-16T21:54:53Z","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":"cisco","product":"cbos"}],"references":[{"url":"http://www.cisco.com/warp/public/707/CBOS-multiple2-pub.html","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/139","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-0751"},{"url":"https://github.com/advisories/GHSA-v59f-9wq8-3hgg"}],"sources":{"cve":[{"id":"CVE-2001-0751","description":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.","status":"published","published":"2002-03-09T05:00:00Z","modified":"2024-08-08T04:30:06.059Z","updated_at":"2026-11-02T14:34:43.358691Z"}],"euvd":[{"id":"EUVD-2001-0736","description":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.","status":"published","published":"2002-03-09T05:00:00Z","modified":"2024-08-08T04:30:06Z","updated_at":"2026-11-03T01:14:50.111938Z"}],"ghsa":[{"id":"GHSA-v59f-9wq8-3hgg","title":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence...","description":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.","status":"published","published":"2022-04-30T18:16:40Z","modified":"2023-01-30T05:05:40Z","updated_at":"2026-11-02T14:47:19.787947Z"}],"nvd":[{"id":"CVE-2001-0751","description":"Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.","status":"published","published":"2001-10-18T04:00:00Z","modified":"2026-06-16T21:54:53.43Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:00:40.572315Z"}]}}