{"id":"CVE-2021-40423","aliases":["EUVD-2021-27600","GHSA-4grj-8qw5-j9f8"],"status":"published","title":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of...","description":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of Reolink RLC-410W v3.0.0.136_20121102. A specially-crafted series of HTTP requests can lead to denial of service. An attacker can send an HTTP request to trigger this vulnerability.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01339,"percentile":0.71492,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2022-01-28T19:10:02Z","modified":"2026-06-17T04:06:54Z","products":[{"vendor":"reolink","product":"rlc-410w_firmware"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2022-1432","tags":["x_refsource_MISC","x_transferred","Broken Link","Technical Description","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40423"},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1432","tags":["Exploit","Technical Description","Third Party Advisory"]},{"url":"https://github.com/advisories/GHSA-4grj-8qw5-j9f8"}],"sources":{"cve":[{"id":"CVE-2021-40423","description":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of Reolink RLC-410W v3.0.0.136_20121102. A specially-crafted series of HTTP requests can lead to denial of service. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2022-01-28T19:10:02Z","modified":"2025-04-15T19:22:08.253Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:33:01.852999Z"}],"euvd":[{"id":"EUVD-2021-27600","description":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of Reolink RLC-410W v3.0.0.136_20121102. A specially-crafted series of HTTP requests can lead to denial of service. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2022-01-28T19:10:02Z","modified":"2025-04-15T19:22:08Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:26.346189Z"}],"ghsa":[{"id":"GHSA-4grj-8qw5-j9f8","title":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of...","description":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of Reolink RLC-410W v3.0.0.136_20121102. A specially-crafted series of HTTP requests can lead to denial of service. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2022-01-29T00:00:42Z","modified":"2023-02-03T05:05:14Z","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-20"],"updated_at":"2026-11-02T14:53:42.435671Z"}],"nvd":[{"id":"CVE-2021-40423","description":"A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of Reolink RLC-410W v3.0.0.136_20121102. A specially-crafted series of HTTP requests can lead to denial of service. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2022-01-28T20:15:12.09Z","modified":"2026-06-17T04:06:54.47Z","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":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:07:04.178977Z"}]}}