{
    "id": "CVE-2021-1818",
    "published": "2021-04-02 19:15:20",
    "last_modified": "2026-06-17 03:32:36",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": null,
    "description": "A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.",
    "epss_score": "0.02859",
    "epss_percentile": "0.86378",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-11 18:17:24",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "apple",
            "product": "ipad_os"
        },
        {
            "vendor": "apple",
            "product": "iphone_os"
        },
        {
            "vendor": "apple",
            "product": "mac_os_x"
        },
        {
            "vendor": "apple",
            "product": "macos"
        },
        {
            "vendor": "apple",
            "product": "tvos"
        },
        {
            "vendor": "apple",
            "product": "watchos"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "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/HT212146",
        "https://support.apple.com/en-us/HT212147",
        "https://support.apple.com/en-us/HT212148",
        "https://support.apple.com/en-us/HT212149"
    ]
}