{
    "id": "CVE-2023-3959",
    "published": "2023-11-08 23:15:08",
    "last_modified": "2026-06-17 06:15:29",
    "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-121",
    "description": "Zavio CF7500, CF7300, CF7201, CF7501, CB3211, CB3212, CB5220,\n CB6231, B8520, B8220, and CD321 \n\nIP Cameras\n\nwith firmware version M2.1.6.05 are \nvulnerable to multiple instances of stack-based overflows. While \nprocessing XML elements from incoming network requests, the product does\n not sufficiently check or validate allocated buffer size. This may lead\n to remote code execution.\n\n",
    "epss_score": "0.48765",
    "epss_percentile": "0.98841",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-02 18:17:39",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 48.8% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "zavio",
            "product": "b8220"
        },
        {
            "vendor": "zavio",
            "product": "b8220_firmware"
        },
        {
            "vendor": "zavio",
            "product": "b8520"
        },
        {
            "vendor": "zavio",
            "product": "b8520_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cb3211"
        },
        {
            "vendor": "zavio",
            "product": "cb3211_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cb3212"
        },
        {
            "vendor": "zavio",
            "product": "cb3212_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cb5220"
        },
        {
            "vendor": "zavio",
            "product": "cb5220_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cb6231"
        },
        {
            "vendor": "zavio",
            "product": "cb6231_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cd321"
        },
        {
            "vendor": "zavio",
            "product": "cd321_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cf7201"
        },
        {
            "vendor": "zavio",
            "product": "cf7201_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cf7300"
        },
        {
            "vendor": "zavio",
            "product": "cf7300_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cf7500"
        },
        {
            "vendor": "zavio",
            "product": "cf7500_firmware"
        },
        {
            "vendor": "zavio",
            "product": "cf7501"
        },
        {
            "vendor": "zavio",
            "product": "cf7501_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03",
        "https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03"
    ]
}