{"cve_id":"CVE-2021-1789","published":"2021-04-02T18:15:21.747000+00:00","last_modified":"2026-06-17T03:32:33.900000+00:00","vuln_status":"Analyzed","description":"A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","base_score":8.8,"base_severity":"HIGH","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-843"],"in_kev":true,"kev_date_added":"2022-05-04","kev_ransomware":false,"epss_score":0.13975,"epss_percentile":0.9655,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":true,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:37:49.285398+00:00","first_seen":"2021-04-02T18:15:21.747000+00:00","kev_first_seen":"2022-05-04T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["apple","fedoraproject","webkitgtk"],"products":["fedora","ipados","iphone_os","mac_os_x","macos","tvos","watchos","webkitgtk"],"affected":[{"vendor":"apple","product":"ipados","ranges":["< 14.4"]},{"vendor":"apple","product":"iphone_os","ranges":["< 14.4"]},{"vendor":"apple","product":"mac_os_x","ranges":["≥ 10.14 and < 10.14.6","≥ 10.15 and < 10.15.7","10.14.6","10.15.7"]},{"vendor":"apple","product":"macos","ranges":["≥ 11.0 and < 11.2"]},{"vendor":"apple","product":"tvos","ranges":["< 14.4"]},{"vendor":"apple","product":"watchos","ranges":["< 7.3"]},{"vendor":"fedoraproject","product":"fedora","ranges":["32","33"]},{"vendor":"webkitgtk","product":"webkitgtk","ranges":["< 2.30.6"]}]}