{
    "id": "CVE-2021-20093",
    "published": "2021-06-16 12:15:12",
    "last_modified": "2026-06-17 03:33:15",
    "cvss_score": "9.1",
    "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:N/A:H",
    "cwe": "CWE-125",
    "description": "A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.",
    "epss_score": "0.33304",
    "epss_percentile": "0.98328",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:28",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 33.3% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "siemens",
            "product": "pss_cape"
        },
        {
            "vendor": "siemens",
            "product": "sicam_230"
        },
        {
            "vendor": "siemens",
            "product": "sicam_230_firmware"
        },
        {
            "vendor": "siemens",
            "product": "simatic_information_server"
        },
        {
            "vendor": "siemens",
            "product": "simatic_pcs_neo"
        },
        {
            "vendor": "siemens",
            "product": "simatic_process_historian"
        },
        {
            "vendor": "siemens",
            "product": "simatic_wincc_oa"
        },
        {
            "vendor": "siemens",
            "product": "simit_simulation_platform"
        },
        {
            "vendor": "siemens",
            "product": "sinec_infrastructure_network_services"
        },
        {
            "vendor": "siemens",
            "product": "sinema_remote_connect_server"
        },
        {
            "vendor": "wibu",
            "product": "codemeter"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf",
        "https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02",
        "https://www.tenable.com/security/research/tra-2021-24",
        "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf",
        "https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02",
        "https://www.tenable.com/security/research/tra-2021-24"
    ]
}