{
    "id": "CVE-2021-1789",
    "published": "2021-04-02 18:15:21",
    "last_modified": "2026-06-17 03:32:33",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "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",
    "cwe": "CWE-843",
    "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.",
    "epss_score": "0.13975",
    "epss_percentile": "0.96427",
    "kev": 1,
    "kev_due": "2022-05-25",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:28",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-05-25."
    },
    "products": [
        {
            "vendor": "apple",
            "product": "ipados"
        },
        {
            "vendor": "apple",
            "product": "iphone_os"
        },
        {
            "vendor": "apple",
            "product": "mac_os_x"
        },
        {
            "vendor": "apple",
            "product": "macos"
        },
        {
            "vendor": "apple",
            "product": "tvos"
        },
        {
            "vendor": "apple",
            "product": "watchos"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "webkitgtk",
            "product": "webkitgtk"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-1789",
        "date_added": "2022-05-04",
        "due_date": "2022-05-25",
        "vendor": "Apple",
        "product": "Multiple Products",
        "name": "Apple Multiple Products Type Confusion Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/",
        "https://security.gentoo.org/glsa/202104-03",
        "https://support.apple.com/en-us/HT212146",
        "https://support.apple.com/en-us/HT212147",
        "https://support.apple.com/en-us/HT212148",
        "https://support.apple.com/en-us/HT212149",
        "https://support.apple.com/en-us/HT212152",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/",
        "https://security.gentoo.org/glsa/202104-03",
        "https://support.apple.com/en-us/HT212146",
        "https://support.apple.com/en-us/HT212147",
        "https://support.apple.com/en-us/HT212148",
        "https://support.apple.com/en-us/HT212149",
        "https://support.apple.com/en-us/HT212152",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1789"
    ]
}