{
    "id": "CVE-2019-8258",
    "published": "2019-03-05 15:29:00",
    "last_modified": "2026-06-17 02:41:45",
    "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-122",
    "description": "UltraVNC revision 1198 has a heap buffer overflow vulnerability in VNC client code which results code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1199.",
    "epss_score": "0.04434",
    "epss_percentile": "0.91124",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-07 18:17:21",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "siemens",
            "product": "sinumerik_access_mymachine\\/p2p"
        },
        {
            "vendor": "siemens",
            "product": "sinumerik_pcu_base_win10_software\\/ipc"
        },
        {
            "vendor": "siemens",
            "product": "sinumerik_pcu_base_win7_software\\/ipc"
        },
        {
            "vendor": "uvnc",
            "product": "ultravnc"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf",
        "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-004-ultravnc-heap-based-buffer-overflow/",
        "https://www.us-cert.gov/ics/advisories/icsa-20-161-06",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf",
        "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-004-ultravnc-heap-based-buffer-overflow/",
        "https://www.us-cert.gov/ics/advisories/icsa-20-161-06"
    ]
}