{
    "id": "CVE-2020-6989",
    "published": "2020-03-24 19:15:21",
    "last_modified": "2026-06-17 03:24:04",
    "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": "In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, a buffer overflow in the web server allows remote attackers to cause a denial-of-service condition or execute arbitrary code.",
    "epss_score": "0.03498",
    "epss_percentile": "0.88849",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-09 18:17:26",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-hv-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-hv-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-wv-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12msc-12tx-4gsfp-wv-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-hv-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-hv-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-wv-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-12mst-12tx-4gsfp-wv-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-hv-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-hv-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-wv-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16msc-8tx-4gsfp-wv-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16mst-8tx-4gsfp-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16mst-8tx-4gsfp-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16mst-8tx-4gsfp-hv-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16mst-8tx-4gsfp-hv-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16mst-8tx-4gsfp-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-16mst-8tx-4gsfp-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-hv-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-hv-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-wv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-wv-hv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-wv-hv_firmware"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-wv-wv"
        },
        {
            "vendor": "moxa",
            "product": "pt-7528-24tx-wv-wv_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://www.us-cert.gov/ics/advisories/icsa-20-056-03",
        "https://www.us-cert.gov/ics/advisories/icsa-20-056-03"
    ]
}