Security Updates for Windows App Client for Windows Desktop (June 2026)

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

include('compat.inc');

if (description)
{
  script_id(324977);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/09");

  script_cve_id(
    "CVE-2026-42908",
    "CVE-2026-42909",
    "CVE-2026-42985",
    "CVE-2026-42992",
    "CVE-2026-44799",
    "CVE-2026-44801",
    "CVE-2026-45639",
    "CVE-2026-47289"
  );

  script_name(english:"Security Updates for Windows App Client for Windows Desktop (June 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The Windows app installed on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Windows app installed on the remote host is missing security updates. It is,
therefore, affected by multiple vulnerabilities:

  - Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.
    (CVE-2026-42908)

  - Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
    (CVE-2026-42909)

  - Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
    (CVE-2026-42985)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42908");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42909");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42985");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42992");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44799");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44801");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45639");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47289");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a security update, please review the vendor advisory.");
  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:R/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-2026-47289");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-42985");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(122, 125, 362, 416);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:windows_app");
  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");
  script_require_ports(139, 445);

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

var app = 'MicrosoftCorporationII.Windows365';

var app_info = vcf::microsoft_appstore::get_app_info(app:app);
if (empty_or_null(app_info)) audit(AUDIT_NOT_INST, 'Microsoft Windows App');

vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
  { 'fixed_version': '2.0.1193.0'}
];

vcf::microsoft_appstore::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);