Windows Package Manager (WinGet) < 1.29.280 Elevation of Privilege (CVE-2026-68821)

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

include('compat.inc');

if (description)
{
  script_id(334617);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/26");

  script_cve_id("CVE-2026-68821");

  script_name(english:"Windows Package Manager (WinGet) < 1.29.280 Elevation of Privilege (CVE-2026-68821)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an elevation of privilege vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Windows Package Manager (WinGet) installed on the remote host is prior to 1.29.280. It is,
therefore, affected by an elevation of privilege vulnerability:

  - An elevation of privilege vulnerability exists in Windows Package Manager that allows a local attacker
    with low privileges to gain elevated privileges. (CVE-2026-68821)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported
version number.");
  # https://github.com/microsoft/winget-cli/releases/tag/v1.29.280
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1fea1665");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68821");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Windows Package Manager (WinGet) version 1.29.280 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/AC:L/PR:L/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:"cvss_score_source", value:"CVE-2026-68821");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:app_installer");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

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

  script_dependencies("smb_hotfixes.nasl", "wmi_enum_windows_app_store.nbin");
  script_require_keys("SMB/Registry/Enumerated", "WMI/Windows App Store/Enumerated", "installed_sw/Microsoft.DesktopAppInstaller");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Microsoft.DesktopAppInstaller', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '1.29.280'}
      ]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:result);