{
    "id": "CVE-2021-31955",
    "published": "2021-06-08 23:15:08",
    "last_modified": "2026-06-17 03:52:33",
    "cvss_score": "5.5",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
    "cwe": "CWE-497",
    "description": "Windows Kernel Information Disclosure Vulnerability",
    "epss_score": "0.81107",
    "epss_percentile": "0.99624",
    "kev": 1,
    "kev_due": "2021-11-17",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:27:38",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2021-11-17."
    },
    "products": [
        {
            "vendor": "microsoft",
            "product": "windows_10_1809"
        },
        {
            "vendor": "microsoft",
            "product": "windows_10_1909"
        },
        {
            "vendor": "microsoft",
            "product": "windows_10_2004"
        },
        {
            "vendor": "microsoft",
            "product": "windows_10_20h2"
        },
        {
            "vendor": "microsoft",
            "product": "windows_10_21h1"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2004"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2019"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_20h2"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-31955",
        "date_added": "2021-11-03",
        "due_date": "2021-11-17",
        "vendor": "Microsoft",
        "product": "Windows",
        "name": "Microsoft Windows Kernel Information Disclosure Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31955",
        "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31955",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31955"
    ]
}