{
    "id": "CVE-2023-40044",
    "published": "2023-09-27 15:18:57",
    "last_modified": "2026-06-17 06:15:55",
    "cvss_score": "10.0",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
    "cwe": "CWE-502",
    "description": "In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a pre-authenticated attacker could leverage a .NET deserialization vulnerability in the Ad Hoc Transfer module to execute remote commands on the underlying WS_FTP Server operating system.",
    "epss_score": "0.90150",
    "epss_percentile": "0.99794",
    "kev": 1,
    "kev_due": "2023-10-26",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:32:45",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2023-10-26."
    },
    "products": [
        {
            "vendor": "progress",
            "product": "ws_ftp_server"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2023-40044",
        "date_added": "2023-10-05",
        "due_date": "2023-10-26",
        "vendor": "Progress",
        "product": "WS_FTP Server",
        "name": "Progress WS_FTP Server Deserialization of Untrusted Data Vulnerability",
        "ransomware": 1
    },
    "exploits": [],
    "refs_list": [
        "http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html",
        "https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044",
        "https://censys.com/cve-2023-40044/",
        "https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023",
        "https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044",
        "https://www.progress.com/ws_ftp",
        "https://www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/",
        "https://www.theregister.com/2023/10/02/ws_ftp_update/",
        "http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html",
        "https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044",
        "https://censys.com/cve-2023-40044/",
        "https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023",
        "https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044",
        "https://www.progress.com/ws_ftp",
        "https://www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/",
        "https://www.theregister.com/2023/10/02/ws_ftp_update/",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-40044"
    ]
}