{"id":"CVE-2021-43105","aliases":["EUVD-2021-30056","GHSA-fh5j-qj82-2m8v"],"status":"published","title":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that...","description":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that allows specific malicious users to inject `NS` records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00541,"percentile":0.46016,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-03-28T22:02:34Z","modified":"2026-06-17T04:10:31Z","products":[{"vendor":"technitium","product":"dns_server"}],"references":[{"url":"https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43105"},{"url":"https://github.com/advisories/GHSA-fh5j-qj82-2m8v"}],"sources":{"cve":[{"id":"CVE-2021-43105","description":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that allows specific malicious users to inject `NS` records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.","status":"published","published":"2022-03-28T22:02:34Z","modified":"2024-08-04T03:47:13.577Z","updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30056","description":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that allows specific malicious users to inject `NS` records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.","status":"published","published":"2022-03-28T22:02:34Z","modified":"2024-08-04T03:47:13Z","updated_at":"2026-11-03T03:24:14.796505Z"}],"ghsa":[{"id":"GHSA-fh5j-qj82-2m8v","title":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that...","description":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that allows specific malicious users to inject `NS` records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.","status":"published","published":"2022-03-30T00:00:31Z","modified":"2023-01-27T05:01:15Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T14:41:51.095902Z"}],"nvd":[{"id":"CVE-2021-43105","description":"A vulnerability in the bailiwick checking function in Technitium DNS Server \u003c= v7.0 exists that allows specific malicious users to inject `NS` records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.","status":"published","published":"2022-03-28T23:15:07.717Z","modified":"2026-06-17T04:10:31.14Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:05.581807Z"}]}}