Siemens Industrial Edge Devices Authorization Bypass Through User-Controlled Key (CVE-2025-40805)

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

include('compat.inc');

if (description)
{
  script_id(505079);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/14");

  script_cve_id("CVE-2025-40805");
  script_xref(name:"ICSA", value:"26-015-08");

  script_name(english:"Siemens Industrial Edge Devices Authorization Bypass Through User-Controlled Key (CVE-2025-40805)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Affected devices do not properly enforce user authentication on
specific API endpoints. This could facilitate an unauthenticated
remote attacker to circumvent authentication and impersonate a
legitimate user. Successful exploitation requires that the attacker
has learned the identity of a legitimate user.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/html/ssa-001536.html");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/html/ssa-014678.html");
  # https://docs.eu1.edge.siemens.cloud/release_notes/device_release_notes/LPE9413.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?22ccc3bd");
  # https://docs.eu1.edge.siemens.cloud/release_notes/device_release_notes/SCALANCELPE9433Integrated.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cbc947d2");
  # https://docs.industrial-operations-x.siemens.cloud/r/en-us/v1.24.2/industrial-edge-own-device/release-notes
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4b3af64a");
  # https://docs.industrial-operations-x.siemens.cloud/r/en-us/v1.24.2/industrial-edge-virtual/cloud-device/release-notes
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8a6b8016");
  # https://docs.industrial-operations-x.siemens.cloud/r/en-us/v1.25/one-db-simatic-iot2050-industrial-edge-device/all-release-notes/release-notes-v1.25
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?456f1859");
  # https://docs.industrial-operations-x.siemens.cloud/r/en-us/v3.1/simatic-ipc-ied-os/release-notes
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7d04a397");
  script_set_attribute(attribute:"see_also", value:"https://support.industry.siemens.com/cs/ww/en/view/109825605/");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-08");
  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:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-40805");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(639);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/10");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_lpe9413_firmware:2.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_lpe9433_firmware:2.2");
  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/Siemens");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Siemens');

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

var vuln_cpes = {
    "cpe:/o:siemens:scalance_lpe9413_firmware:2.2" :
        {"versionEndExcluding" : "2.2", "family" : "SCALANCE", "orderNumbers" : ['6GK5998-3GS01-2AC2']},
    "cpe:/o:siemens:scalance_lpe9433_firmware:2.2" :
        {"versionEndExcluding" : "2.2", "family" : "SCALANCE", "orderNumbers" : ['6GK5998-3GS11-2AC2']}
};

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