{"api_version":"1","generated_at":"2026-05-11T14:04:25+00:00","cve":"CVE-2018-4221","urls":{"html":"https://cve.report/CVE-2018-4221","api":"https://cve.report/api/cve/CVE-2018-4221.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2018-4221","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-4221"},"summary":{"title":"CVE-2018-4221","description":"An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the \"Security\" component. It allows web sites to track users by leveraging the transmission of S/MIME client certificates.","state":"PUBLIC","assigner":"product-security@apple.com","published_at":"2018-06-08 18:29:00","updated_at":"2019-03-08 15:14:00"},"problem_types":["CWE-200"],"metrics":[],"references":[{"url":"http://www.securitytracker.com/id/1041027","name":"1041027","refsource":"SECTRACK","tags":["Third Party Advisory","VDB Entry"],"title":"Apple macOS/OS X Multiple Flaws Let Remote Users Execute Arbitrary Code and Deny Service and Let Local Users Obtain Potentially Sensitive Information, Bypass Security, and Gain Elevated Privileges - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://support.apple.com/HT208848","name":"https://support.apple.com/HT208848","refsource":"CONFIRM","tags":["Vendor Advisory"],"title":"About the security content of iOS 11.4 - Apple Support","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/104897","name":"104897","refsource":"BID","tags":["Third Party Advisory","VDB Entry"],"title":"Apple iOS and macOS Multiple Security Vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://support.apple.com/HT208849","name":"https://support.apple.com/HT208849","refsource":"CONFIRM","tags":["Vendor Advisory"],"title":"About the security content of macOS High Sierra 10.13.5, Security Update 2018-003 Sierra, Security Update 2018-003 El Capitan - Apple Support","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-4221","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-4221","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2018","cve_id":"4221","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"apple","cpe5":"iphone_os","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"4221","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"apple","cpe5":"iphone_os","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"4221","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"apple","cpe5":"mac_os_x","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"4221","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"apple","cpe5":"mac_os_x","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"product-security@apple.com","ID":"CVE-2018-4221","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the \"Security\" component. It allows web sites to track users by leveraging the transmission of S/MIME client certificates."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"1041027","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1041027"},{"name":"104897","refsource":"BID","url":"http://www.securityfocus.com/bid/104897"},{"name":"https://support.apple.com/HT208848","refsource":"CONFIRM","url":"https://support.apple.com/HT208848"},{"name":"https://support.apple.com/HT208849","refsource":"CONFIRM","url":"https://support.apple.com/HT208849"}]}},"nvd":{"publishedDate":"2018-06-08 18:29:00","lastModifiedDate":"2019-03-08 15:14:00","problem_types":["CWE-200"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*","versionEndExcluding":"10.13.5","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*","versionEndExcluding":"11.4","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2018","CveId":"4221","Ordinal":"120135","Title":"CVE-2018-4221","CVE":"CVE-2018-4221","Year":"2018"},"notes":[{"CveYear":"2018","CveId":"4221","Ordinal":"1","NoteData":"An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the \"Security\" component. It allows web sites to track users by leveraging the transmission of S/MIME client certificates.","Type":"Description","Title":null},{"CveYear":"2018","CveId":"4221","Ordinal":"2","NoteData":"2018-06-08","Type":"Other","Title":"Published"},{"CveYear":"2018","CveId":"4221","Ordinal":"3","NoteData":"2018-07-29","Type":"Other","Title":"Modified"}]}}}