{"id":"CVE-2021-45489","aliases":["EUVD-2021-32255","GHSA-rgh6-hjmr-j5fv"],"status":"published","title":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","description":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","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":0.62934,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-338"],"published":"2021-12-25T01:03:41Z","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","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45489"},{"url":"https://github.com/advisories/GHSA-rgh6-hjmr-j5fv"}],"sources":{"cve":[{"id":"CVE-2021-45489","description":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","status":"published","published":"2021-12-25T01:03:41Z","modified":"2024-08-04T04:39:21.143Z","updated_at":"2026-11-02T14:33:02.580561Z"}],"euvd":[{"id":"EUVD-2021-32255","description":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","status":"published","published":"2021-12-25T01:03:41Z","modified":"2024-08-04T04:39:21Z","updated_at":"2026-11-03T03:08:27.448176Z"}],"ghsa":[{"id":"GHSA-rgh6-hjmr-j5fv","title":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","description":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","status":"published","published":"2021-12-26T00:00:48Z","modified":"2023-02-03T05:03:31Z","cwes":["CWE-338"],"updated_at":"2026-11-02T14:53:22.687695Z"}],"nvd":[{"id":"CVE-2021-45489","description":"In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.","status":"published","published":"2021-12-25T02:15:06.847Z","modified":"2026-06-17T04:13:29.707Z","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-338"],"updated_at":"2026-11-02T14:07:02.977492Z"}]}}