Tanium Server 7.7.3.x < 7.7.3.8298 / 7.8.2.x < 7.8.2.1198 / 7.8.4.x < 7.8.4.1327 DoS (TAN-2026-016)

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

include('compat.inc');

if (description)
{
  script_id(327368);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/17");

  script_cve_id("CVE-2026-15053");
  script_xref(name:"IAVB", value:"2026-B-0195");

  script_name(english:"Tanium Server 7.7.3.x < 7.7.3.8298 / 7.8.2.x < 7.8.2.1198 / 7.8.4.x < 7.8.4.1327 DoS (TAN-2026-016)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Tanium Server installed on the remote host is 7.7.3.x prior to 7.7.3.8298, 7.8.2.x prior to
7.8.2.1198, or 7.8.4.x prior to 7.8.4.1327. It is, therefore, affected by a denial of service vulnerability:

  - A denial of service vulnerability in Tanium Server could allow an unauthenticated, network-based attacker to
    perform a denial of service attack against the Tanium Server. (CVE-2026-15053)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security.tanium.com/TAN-2026-016");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Tanium Server version 7.7.3.8298, 7.8.2.1198, 7.8.4.1327, or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:U/C:N/I:N/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-2026-15053");

  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:"2026/07/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:tanium:tanium_server");
  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("tanium_server_win_installed.nbin");
  script_require_keys("installed_sw/Tanium Server");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Tanium Server', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version': '7.7.3.0', 'fixed_version': '7.7.3.8298'},
        {'min_version': '7.8.2.0', 'fixed_version': '7.8.2.1198'},
        {'min_version': '7.8.4.0', 'fixed_version': '7.8.4.1327'}
      ]
    }
  ]
};

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