{
    "id": "CVE-2021-27852",
    "published": "2021-05-27 21:15:20",
    "last_modified": "2026-06-17 03:45:31",
    "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": "CWE-502",
    "description": "Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.",
    "epss_score": "0.30258",
    "epss_percentile": "0.98167",
    "kev": 1,
    "kev_due": "2022-05-02",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:27:30",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-05-02."
    },
    "products": [
        {
            "vendor": "checkbox",
            "product": "survey"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-27852",
        "date_added": "2022-04-11",
        "due_date": "2022-05-02",
        "vendor": "Checkbox",
        "product": "Checkbox Survey",
        "name": "Checkbox Survey Deserialization of Untrusted Data Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://www.kb.cert.org/vuls/id/706695",
        "https://www.kb.cert.org/vuls/id/706695",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27852"
    ]
}