{
    "id": "CVE-2021-33044",
    "published": "2021-09-15 22:15:10",
    "last_modified": "2026-06-17 03:54:03",
    "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-287",
    "description": "The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.",
    "epss_score": "0.99987",
    "epss_percentile": "0.99984",
    "kev": 1,
    "kev_due": "2024-09-11",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:28:08",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2024-09-11."
    },
    "products": [
        {
            "vendor": "dahuasecurity",
            "product": "ipc-hum7xxx"
        },
        {
            "vendor": "dahuasecurity",
            "product": "ipc-hum7xxx_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "ipc-hx3xxx"
        },
        {
            "vendor": "dahuasecurity",
            "product": "ipc-hx3xxx_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "ipc-hx5xxx"
        },
        {
            "vendor": "dahuasecurity",
            "product": "ipc-hx5xxx_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd1a1"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd1a1_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd22"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd22_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd49"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd49_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd50"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd50_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd52c"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd52c_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd6al"
        },
        {
            "vendor": "dahuasecurity",
            "product": "sd6al_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf1241"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf1241_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf2221"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf2221_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf5x01"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf5x01_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf5x21"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-bf5x21_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-pt8x21b"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-pt8x21b_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-sd2221"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-sd2221_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-sd8x21"
        },
        {
            "vendor": "dahuasecurity",
            "product": "tpc-sd8x21_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "vth-542xh"
        },
        {
            "vendor": "dahuasecurity",
            "product": "vth-542xh_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "vto-65xxx"
        },
        {
            "vendor": "dahuasecurity",
            "product": "vto-65xxx_firmware"
        },
        {
            "vendor": "dahuasecurity",
            "product": "vto-75x95x"
        },
        {
            "vendor": "dahuasecurity",
            "product": "vto-75x95x_firmware"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-33044",
        "date_added": "2024-08-21",
        "due_date": "2024-09-11",
        "vendor": "Dahua",
        "product": "IP Camera Firmware",
        "name": "Dahua IP Camera Authentication Bypass Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html",
        "http://seclists.org/fulldisclosure/2021/Oct/13",
        "https://www.dahuasecurity.com/support/cybersecurity/details/957",
        "http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html",
        "http://seclists.org/fulldisclosure/2021/Oct/13",
        "https://www.dahuasecurity.com/support/cybersecurity/details/957",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33044"
    ]
}