Microsoft Windows SDK < 10.0.26100.7463 Inbox COM Objects (Global Memory) RCE (January 2026)

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

include('compat.inc');

if (description)
{
  script_id(283474);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/13");

  script_cve_id("CVE-2026-21219");
  script_xref(name:"IAVA", value:"2026-A-0055");

  script_name(english:"Microsoft Windows SDK < 10.0.26100.7463 Inbox COM Objects (Global Memory) RCE (January 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Microsoft Windows SDK installed on the remote host is prior to 10.0.26100.7463. It is, therefore,
affected by a remote code execution vulnerability:

  - Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally. (CVE-2026-21219)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21219
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4b77bec4");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Windows SDK version 10.0.26100.7463 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:L/AC:H/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-2026-21219");

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

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

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

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

  script_dependencies("windows_sdk_installed.nbin");
  script_require_keys("SMB/Registry/Enumerated", "installed_sw/Windows SDK");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Windows SDK', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '10.0.26100.7463'},
        {'min_version':'10.1', 'fixed_version': '10.1.26100.7463', 'fixed_display':'10.1.26100.7463 (10.0.26100.7463)'}
      ]
    }
  ]
};

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