{
    "id": "CVE-2021-20022",
    "published": "2021-04-09 18:15:13",
    "last_modified": "2026-08-12 05:17:34",
    "cvss_score": "7.2",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-434",
    "description": "SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.",
    "epss_score": "0.16509",
    "epss_percentile": "0.96892",
    "kev": 1,
    "kev_due": "2021-11-17",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:27:19",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2021-11-17."
    },
    "products": [
        {
            "vendor": "microsoft",
            "product": "windows"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_3300"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_3300_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_4300"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_4300_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_5000"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_5000_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_5050"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_5050_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_7000"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_7000_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_7050"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_7050_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_8300"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_8300_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_9000"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_appliance_9000_firmware"
        },
        {
            "vendor": "sonicwall",
            "product": "email_security_virtual_appliance"
        },
        {
            "vendor": "sonicwall",
            "product": "hosted_email_security"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-20022",
        "date_added": "2021-11-03",
        "due_date": "2021-11-17",
        "vendor": "SonicWall",
        "product": "SonicWall Email Security",
        "name": "SonicWall Email Security Unrestricted Upload of File Vulnerability",
        "ransomware": 1
    },
    "exploits": [],
    "refs_list": [
        "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008",
        "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20022"
    ]
}