{"id":"CVE-2021-42145","aliases":["EUVD-2021-29128","GHSA-vwwf-cxx3-3hpv"],"status":"published","title":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through...","description":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00429,"percentile":0.37436,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-755"],"published":"2024-01-24T00:00:00Z","modified":"2026-06-17T04:09:25Z","products":[{"vendor":"contiki-ng","product":"tinydtls"}],"references":[{"url":"https://seclists.org/fulldisclosure/2024/Jan/18","tags":["x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2024/Jan/18"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42145"},{"url":"https://github.com/advisories/GHSA-vwwf-cxx3-3hpv"}],"sources":{"cve":[{"id":"CVE-2021-42145","description":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service.","status":"published","published":"2024-01-24T00:00:00Z","modified":"2025-06-20T19:17:38.238Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:32:58.359368Z"}],"euvd":[{"id":"EUVD-2021-29128","description":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service.","status":"published","published":"2024-01-24T00:00:00Z","modified":"2025-06-20T19:17:38Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:18.601981Z"}],"ghsa":[{"id":"GHSA-vwwf-cxx3-3hpv","title":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through...","description":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service.","status":"published","published":"2024-01-24T21:30:33Z","modified":"2025-06-20T21:31:54Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T15:02:46.844129Z"}],"nvd":[{"id":"CVE-2021-42145","description":"An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service.","status":"published","published":"2024-01-24T19:15:08.42Z","modified":"2026-06-17T04:09:25.733Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:07:08.163458Z"}]}}