{
    "id": "CVE-2021-21017",
    "published": "2021-02-11 20:15:13",
    "last_modified": "2026-06-17 03:34:40",
    "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-122",
    "description": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
    "epss_score": "0.86326",
    "epss_percentile": "0.99729",
    "kev": 1,
    "kev_due": "2021-11-17",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:26:59",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2021-11-17."
    },
    "products": [
        {
            "vendor": "adobe",
            "product": "acrobat"
        },
        {
            "vendor": "adobe",
            "product": "acrobat_dc"
        },
        {
            "vendor": "adobe",
            "product": "acrobat_reader"
        },
        {
            "vendor": "adobe",
            "product": "acrobat_reader_dc"
        },
        {
            "vendor": "apple",
            "product": "macos"
        },
        {
            "vendor": "microsoft",
            "product": "windows"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-21017",
        "date_added": "2021-11-03",
        "due_date": "2021-11-17",
        "vendor": "Adobe",
        "product": "Acrobat and Reader",
        "name": "Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html",
        "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017"
    ]
}