{
    "id": "CVE-2010-4221",
    "published": "2010-11-09 21:00:06",
    "last_modified": "2026-06-16 23:24:23",
    "cvss_score": "10.0",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
    "cwe": "CWE-119",
    "description": "Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to execute arbitrary code via vectors involving a TELNET IAC escape character to a (1) FTP or (2) FTPS server.",
    "epss_score": "0.91303",
    "epss_percentile": "0.99808",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:17:52",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "proftpd",
            "product": "proftpd"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "16851",
            "title": "ProFTPd 1.3.2 rc3 < 1.3.3b (Linux) - Telnet IAC Buffer Overflow (Metasploit)",
            "date": "2011-01-09",
            "url": "https://www.exploit-db.com/exploits/16851"
        },
        {
            "source": "exploit-db",
            "ref_id": "16878",
            "title": "ProFTPd 1.3.2 rc3 < 1.3.3b (FreeBSD) - Telnet IAC Buffer Overflow (Metasploit)",
            "date": "2010-12-02",
            "url": "https://www.exploit-db.com/exploits/16878"
        },
        {
            "source": "exploit-db",
            "ref_id": "15449",
            "title": "ProFTPd IAC 1.3.x - Remote Command Execution",
            "date": "2010-11-07",
            "url": "https://www.exploit-db.com/exploits/15449"
        }
    ],
    "refs_list": [
        "http://bugs.proftpd.org/show_bug.cgi?id=3521",
        "http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050687.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050703.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050726.html",
        "http://secunia.com/advisories/42052",
        "http://secunia.com/advisories/42217",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2010:227",
        "http://www.proftpd.org/docs/NEWS-1.3.3c",
        "http://www.securityfocus.com/bid/44562",
        "http://www.vupen.com/english/advisories/2010/2941",
        "http://www.vupen.com/english/advisories/2010/2959",
        "http://www.vupen.com/english/advisories/2010/2962",
        "http://www.zerodayinitiative.com/advisories/ZDI-10-229/",
        "http://bugs.proftpd.org/show_bug.cgi?id=3521",
        "http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050687.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050703.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050726.html",
        "http://secunia.com/advisories/42052",
        "http://secunia.com/advisories/42217",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2010:227",
        "http://www.proftpd.org/docs/NEWS-1.3.3c",
        "http://www.securityfocus.com/bid/44562",
        "http://www.vupen.com/english/advisories/2010/2941",
        "http://www.vupen.com/english/advisories/2010/2959",
        "http://www.vupen.com/english/advisories/2010/2962"
    ]
}