{
    "id": "CVE-2020-10188",
    "published": "2020-03-06 15:15:14",
    "last_modified": "2026-06-17 02:47:27",
    "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-120",
    "description": "utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a buffer overflow involving the netclear and nextitem functions.",
    "epss_score": "0.74339",
    "epss_percentile": "0.99479",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-09-29 18:17:23",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 74.3% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "arista",
            "product": "eos"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "juniper",
            "product": "junos"
        },
        {
            "vendor": "netkit_telnet_project",
            "product": "netkit_telnet"
        },
        {
            "vendor": "oracle",
            "product": "communications_performance_intelligence_center"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html",
        "https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/telnetd/utility.c#L205-L216",
        "https://lists.debian.org/debian-lts-announce/2020/05/msg00012.html",
        "https://lists.debian.org/debian-lts-announce/2020/08/msg00038.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7FMTRRQTYKWZD2GMXX3GLZV46OLPCLVK/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLU6FL24BSQQEB2SJC26NLJ2MANQDA7M/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3VJ6V2Z3JRNJOBVHSOPMAC76PSSKG6A/",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-EFJrEzPx",
        "https://www.arista.com/en/support/advisories-notices/security-advisories/10702-security-advisory-48",
        "https://www.oracle.com/security-alerts/cpuApr2021.html",
        "http://www.openwall.com/lists/oss-security/2026/01/20/8",
        "https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html",
        "https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/telnetd/utility.c#L205-L216",
        "https://lists.debian.org/debian-lts-announce/2020/05/msg00012.html",
        "https://lists.debian.org/debian-lts-announce/2020/08/msg00038.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7FMTRRQTYKWZD2GMXX3GLZV46OLPCLVK/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLU6FL24BSQQEB2SJC26NLJ2MANQDA7M/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3VJ6V2Z3JRNJOBVHSOPMAC76PSSKG6A/",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-EFJrEzPx",
        "https://www.arista.com/en/support/advisories-notices/security-advisories/10702-security-advisory-48",
        "https://www.oracle.com/security-alerts/cpuApr2021.html"
    ]
}