Copeland XWEB and XWEB Pro Use of a Broken or Risky Cryptographic Algorithm (CVE-2026-21718)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(506218);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/15");

  script_cve_id("CVE-2026-21718");
  script_xref(name:"ICSA", value:"26-057-10");

  script_name(english:"Copeland XWEB and XWEB Pro Use of a Broken or Risky Cryptographic Algorithm (CVE-2026-21718)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"An authentication bypass vulnerability exists in Copeland XWEB Pro
version 1.12.1 and prior, enabling any attackers to bypass the
authentication requirement and achieve pre-authenticated code
execution on the system.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://claroty.com/team82/research/chilling-discoveries-unpacking-vulnerabilities-in-copeland-xweb-pro-controllers
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?520e075b");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10");
  script_set_attribute(attribute:"see_also", value:"https://www.copeland.com/en-us/product-security-resources");
  script_set_attribute(attribute:"solution", value:
"The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-21718");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(327);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/02/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/14");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:copeland:xweb_300d_pro_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:copeland:xweb_500d_pro_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:copeland:xweb_500b_pro_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:copeland:xweb_pro_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Copeland");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Copeland');

var asset = tenable_ot::assets::get(vendor:'Copeland');

var vuln_cpes = {
    "cpe:/o:copeland:xweb_300d_pro_firmware" :
        {"versionEndExcluding" : "1.13", "family" : "XWEBPro"},
    "cpe:/o:copeland:xweb_500d_pro_firmware" :
        {"versionEndExcluding" : "1.13", "family" : "XWEBPro"},
    "cpe:/o:copeland:xweb_500b_pro_firmware" :
        {"versionEndExcluding" : "1.13", "family" : "XWEBPro"},
    "cpe:/o:copeland:xweb_pro_firmware" :
        {"versionEndExcluding" : "1.13", "family" : "XWEBPro"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);