{"id":"CVE-2021-1789","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-1789","summary":null,"details":"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.","published":"2021-04-02T18:15:21.747Z","modified":"2026-04-16T04:31:29.149870013Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.14479,"percentile":0.96422,"asOf":"2026-09-11"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1789"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT212146"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT212147"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT212148"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT212149"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202104-03"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT212152"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-16T04:31:29.149870013Z"}}