{"id":"CVE-2021-45488","aliases":["EUVD-2021-32254","GHSA-ppq5-qxwq-whvw"],"status":"published","title":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","description":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00996,"percentile":0.62935,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-327","CWE-330"],"published":"2021-12-25T01:03:58Z","modified":"2026-06-17T04:13:29Z","products":[{"vendor":"netbsd","product":"netbsd"}],"references":[{"url":"https://arxiv.org/pdf/2112.09604.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45488"},{"url":"https://github.com/advisories/GHSA-ppq5-qxwq-whvw"}],"sources":{"cve":[{"id":"CVE-2021-45488","description":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","status":"published","published":"2021-12-25T01:03:58Z","modified":"2024-08-04T04:39:21.047Z","updated_at":"2026-11-02T14:33:02.580561Z"}],"euvd":[{"id":"EUVD-2021-32254","description":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","status":"published","published":"2021-12-25T01:03:58Z","modified":"2024-08-04T04:39:21Z","updated_at":"2026-11-03T03:08:27.448176Z"}],"ghsa":[{"id":"GHSA-ppq5-qxwq-whvw","title":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","description":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","status":"published","published":"2021-12-26T00:00:48Z","modified":"2023-08-08T15:31:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:54:44.111289Z"}],"nvd":[{"id":"CVE-2021-45488","description":"In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.","status":"published","published":"2021-12-25T02:15:06.803Z","modified":"2026-06-17T04:13:29.583Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:07:02.977492Z"}]}}