Security Update for Microsoft Visual Studio Code (February 2026)

#%NASL_MIN_LEVEL 80900
##
# Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(298881);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/30");

  script_cve_id("CVE-2026-21518", "CVE-2026-21523");
  script_xref(name:"IAVA", value:"2026-A-0120-S");

  script_name(english:"Security Update for Microsoft Visual Studio Code (February 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an application installed that is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Microsoft Visual Studio Code installed on the remote Windows host is prior to 1.109.2. It is,
therefore, affected by multiple vulnerabilities:

  - Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized
    attacker to execute code over a network. (CVE-2026-21523)

  - Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and 
    Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network. (CVE-2026-21518)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21518
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cb26747e");
  # https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21523
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dcd9c497");
  script_set_attribute(attribute:"see_also", value:"https://code.visualstudio.com/updates/v1_109");
  script_set_attribute(attribute:"solution", value:
"Update to Microsoft Visual Studio Code 1.109.2 or later.");
  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-2026-21518");

  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:"2026/02/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:visual_studio_code");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  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("microsoft_visual_studio_code_installed.nbin", "microsoft_visual_studio_code_win_user_installed.nbin");
  script_require_keys("installed_sw/Microsoft Visual Studio Code", "SMB/Registry/Enumerated");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Microsoft Visual Studio Code', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '1.109.2'}
      ]
    }
  ]
};

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