Dell Client BIOS Authentication Bypass (DSA-2026-195)

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

include('compat.inc');

if (description)
{
  script_id(327606);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/20");

  script_cve_id("CVE-2026-35159");
  script_xref(name:"IAVA", value:"2026-A-0697");

  script_name(english:"Dell Client BIOS Authentication Bypass (DSA-2026-195)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"Dell Client Platform BIOS contains an Authentication Bypass by Primary Weakness vulnerability. An unauthenticated
attacker with physical access could potentially exploit this vulnerability, leading to Information Disclosure.

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://www.dell.com/support/kbdoc/en-us/000452197/dsa-2026-195");
  script_set_attribute(attribute:"solution", value:
"Apply the security patch in accordance with the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:P/I:C/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-35159");

  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:"2026/07/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:dell:bios");
  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("bios_get_info_wmi.nbin");
  script_require_keys("BIOS/Model", "BIOS/Version", "BIOS/Vendor");

  exit(0);
}

include('vcf_extras.inc');

var app_name = 'Dell Inc.';
var app_info = vcf::dell_bios_win::get_app_info(app:app_name);
var model = app_info['model'];

if (!model)
  exit(0, 'The model of the device running the Dell BIOS could not be identified.');

var model_fixes = {
  'Alienware 16 Area-51 AA16250': '2.4.1',
  'Alienware 16 Aurora AC16250': '1.13.0',
  'Alienware 16X Aurora AC16251': '2.4.0',
  'Alienware 18 Area-51 AA18250': '2.4.1',
  'Alienware Area-51 AAT2250': '1.17.2',
  'Alienware Aurora ACT1250': '1.16.2',
  'Alienware m15 R6': '1.44.0',
  'Alienware m15 R7': '1.40.0',
  'Alienware m16 R1': '1.34.0',
  'Alienware m16 R2': '1.21.0',
  'Alienware m18 R1': '1.34.0',
  'Alienware m18 R2': '1.22.0',
  'Alienware x14 R2': '1.32.0',
  'Alienware x16 R1': '1.32.0',
  'Alienware x16 R2': '1.22.0',
  'ChengMing 3900': '1.40.0',
  'ChengMing 3910': '1.36.0',
  'ChengMing 3911': '1.36.0',
  'Dell 14 DC14250': '1.7.0',
  'Dell 14 Plus 2-in-1 DB04250': '1.13.0',
  'Dell 14 Plus DB14250': '1.13.0',
  'Dell 15 DC15250': '1.10.0',
  'Dell 16 Plus 2-in-1 DB06250': '1.13.0',
  'Dell 16 Plus DB16250': '1.13.0',
  'Dell 24 All-in-One EC24250': '1.15.0',
  'Dell 27 All-in-One EC27250': '1.15.0',
  'Dell G15 5510': '1.40.0',
  'Dell G15 5511': '1.43.0',
  'Dell G15 5520': '1.41.0',
  'Dell G15 5530': '1.33.0',
  'Dell G16 7620': '1.41.0',
  'Dell G16 7630': '1.33.0',
  'Dell Pro 13 Plus PB13250': '2.13.4',
  'Dell Pro 13 Plus PB13255': '1.15.0',
  'Dell Pro 13 Premium PA13250': '2.13.4',
  'Dell Pro 14 Essential PV14250': '1.6.0',
  'Dell Pro 14 PC14250': '1.15.2',
  'Dell Pro 14 Plus PB14250': '2.13.4',
  'Dell Pro 14 Plus PB14255': '1.15.0',
  'Dell Pro 14 Premium PA14250': '2.13.4',
  'Dell Pro 16 PC16250': '1.15.2',
  'Dell Pro 16 Plus PB16250': '2.13.4',
  'Dell Pro 16 Plus PB16255': '1.15.0',
  'Dell Pro 24 All-in-One PLUS QB24250': '1.15.1',
  'Dell Pro 24 All-in-One QC24250': '1.15.1',
  'Dell Pro 24 All-in-One QC24251': '1.15.1',
  'Dell Pro Laptop PC14250': '1.15.2',
  'Dell Pro Laptop PC16250': '1.15.2',
  'Dell Pro Max 14 MC14250': '1.14.1',
  'Dell Pro Max 14 MC14255': '2.4.0',
  'Dell Pro Max 16 MC16250': '1.14.1',
  'Dell Pro Max 16 MC16255': '2.4.0',
  'Dell Pro Max Micro FCM2250': '1.15.2',
  'Dell Pro Max Slim FCS1250': '1.15.2',
  'Dell Pro Max Tower T2 FCT2250': '1.15.2',
  'Dell Pro Micro': '1.13.0',
  'Dell Pro Micro Plus QBM1250': '1.15.1',
  'Dell Pro Micro QCM1250': '1.15.1',
  'Dell Pro Precision 7 T1 PW7T1260': '1.15.1',
  'Dell Pro Rugged 10 Tablets': '1.9.0',
  'Dell Pro Rugged 12 Tablet RA02260': '1.9.0',
  'Dell Pro Rugged 13 RA13250': '1.16.1',
  'Dell Pro Rugged 14 RB14250': '1.16.1',
  'Dell Pro Slim': '1.13.0',
  'Dell Pro Slim Essential QVS1260': '1.15.0',
  'Dell Pro Slim Plus QBS1250': '1.15.1',
  'Dell Pro Slim QCS1250': '1.15.1',
  'Dell Pro Tower': '1.13.0',
  'Dell Pro Tower Essential QVT1260': '1.15.0',
  'Dell Pro Tower Plus QBT1250': '1.15.1',
  'Dell Pro Tower QCT1250': '1.15.1',
  'Dell Slim ECS1250': '1.15.0',
  'Dell Tower ECT1250': '1.15.0',
  'Inspiron 13 5330': '1.31.0',
  'Inspiron 14 5420': '1.36.0',
  'Inspiron 14 5430': '1.29.0',
  'Inspiron 14 5440': '1.22.0',
  'Inspiron 14 7430 2-in-1': '1.29.0',
  'Inspiron 14 7440 2-in-1': '1.22.0',
  'Inspiron 14 Plus 7420': '1.37.0',
  'Inspiron 14 Plus 7430': '1.29.0',
  'Inspiron 14 Plus 7440': '1.25.0',
  'Inspiron 15 3511': '1.46.0',
  'Inspiron 15 3520': '1.41.0',
  'Inspiron 15 3530': '1.32.0',
  'Inspiron 16 5620': '1.36.0',
  'Inspiron 16 5630': '1.29.0',
  'Inspiron 16 5640': '1.21.0',
  'Inspiron 16 7630 2-in-1': '1.29.0',
  'Inspiron 16 7640 2-in-1': '1.21.0',
  'Inspiron 16 Plus 7620': '1.37.0',
  'Inspiron 16 Plus 7630': '1.29.0',
  'Inspiron 16 Plus 7640': '1.25.0',
  'Inspiron 24 5420 All-in-One': '1.29.0',
  'Inspiron 24 5430 All-in-One': '1.22.0',
  'Inspiron 27 7720 All-in-One': '1.29.0',
  'Inspiron 27 7730 All-in-One': '1.22.0',
  'Inspiron 3020 Desktop': '1.36.0',
  'Inspiron 3020 S': '1.36.0',
  'Inspiron 3030': '1.26.0',
  'Inspiron 3030S': '1.26.0',
  'Inspiron 24 5410 All-in-One': '1.38.0',
  'Inspiron 27 7710 All-in-One': '1.38.0',
  'Latitude 3320': '1.44.0',
  'Latitude 3340': '1.31.0',
  'Latitude 5320': '1.51.0',
  'Latitude 5330': '1.36.0',
  'Latitude 5340': '1.29.0',
  'Latitude 5350': '1.23.0',
  'Latitude 5421': '1.46.0',
  'Latitude 5430': '1.39.1',
  'Latitude 5430 Rugged Laptop': '1.43.0',
  'Latitude 5431': '1.39.0',
  'Latitude 5440': '1.31.1',
  'Latitude 5450': '1.23.1',
  'Latitude 5520': '1.51.0',
  'Latitude 5521': '1.43.0',
  'Latitude 5530': '1.36.0',
  'Latitude 5531': '1.36.0',
  'Latitude 5540': '1.29.0',
  'Latitude 5550': '1.23.0',
  'Latitude 7030 Rugged Extreme Tablet': '1.23.0',
  'Latitude 7230 Rugged Extreme Tablet': '1.32.0',
  'Latitude 7320': '1.50.1',
  'Latitude 7320 Detachable': '1.47.0',
  'Latitude 7330': '1.40.0',
  'Latitude 7330 Rugged Laptop': '1.43.0',
  'Latitude 7340': '1.30.0',
  'Latitude 7350': '1.23.0',
  'Latitude 7420': '1.50.1',
  'Latitude 7430': '1.40.0',
  'Latitude 7440': '1.31.1',
  'Latitude 7450': '1.23.1',
  'Latitude 7520': '1.50.1',
  'Latitude 7530': '1.40.0',
  'Latitude 7640': '1.31.1',
  'Latitude 7650': '1.23.1',
  'Latitude 9330': '1.37.0',
  'Latitude 9420': '1.47.0',
  'Latitude 9430': '1.40.1',
  'Latitude 9440 2-in-1': '1.29.0',
  'Latitude 9450': '1.21.1',
  'Latitude 9520': '1.47.1',
  'OptiPlex 3000 Micro': '1.40.0',
  'OptiPlex 3000 Small Form Factor': '1.40.0',
  'OptiPlex 3000 Tower': '1.40.0',
  'OptiPlex 3000 Thin Client': '1.34.0',
  'OptiPlex 3090 Ultra': '1.42.0',
  'OptiPlex 5000 Micro': '1.40.0',
  'OptiPlex 5000 Small Form Factor': '1.40.0',
  'OptiPlex 5000 Tower': '1.40.0',
  'OptiPlex 5090 Micro': '1.42.0',
  'OptiPlex 5090 Small Form Factor': '1.42.0',
  'OptiPlex 5090 Tower': '1.42.0',
  'OptiPlex 5400 AIO': '1.1.59',
  'OptiPlex 5490 AIO': '1.47.0',
  'OptiPlex 7000 Micro': '1.40.0',
  'OptiPlex 7000 Small Form Factor': '1.40.0',
  'OptiPlex 7000 Tower': '1.40.0',
  'OptiPlex 7000 XE Micro': '1.40.0',
  'OptiPlex 7000 OEM MT+': '1.40.0',
  'OptiPlex 7090 Tower': '1.42.0',
  'OptiPlex 7090 Ultra': '1.42.0',
  'OptiPlex 7400 AIO': '1.1.59',
  'OptiPlex 7490 AIO': '1.47.0',
  'OptiPlex AIO 7420': '1.26.1',
  'OptiPlex All-in-One 7410': '1.36.0',
  'OptiPlex Micro 7010': '1.36.0',
  'OptiPlex Micro Plus 7010': '1.36.0',
  'OptiPlex Micro 7020': '1.26.1',
  'OptiPlex SFF 7020': '1.26.1',
  'OptiPlex Small Form Factor 7010': '1.36.0',
  'OptiPlex Small Form Factor Plus 7010': '1.36.0',
  'OptiPlex Tower 7010': '1.36.0',
  'OptiPlex Tower Plus 7010': '1.36.0',
  'OptiPlex Tower 7020': '1.26.1',
  'OptiPlex XE4 SFF': '1.40.0',
  'Dell Pro 14 PC14255': '1.14.1',
  'Dell Pro 16 PC16255': '1.14.1',
  'Precision 3260 XE Compact': '3.26.0',
  'Precision 3260 Compact': '3.26.0',
  'Precision 3280 CFF': '1.24.1',
  'Precision 3450': '1.42.0',
  'Precision 3460 XE Small Form Factor': '3.26.0',
  'Precision 3460 Small Form Factor': '3.26.0',
  'Precision 3470': '1.39.0',
  'Precision 3480': '1.31.1',
  'Precision 3490': '1.23.1',
  'Precision 3560': '1.51.0',
  'Precision 3561': '1.43.0',
  'Precision 3570': '1.36.0',
  'Precision 3571': '1.36.0',
  'Precision 3580': '1.29.0',
  'Precision 3581': '1.29.0',
  'Precision 3590': '1.23.0',
  'Precision 3591': '1.23.0',
  'Precision 3650 MT': '1.47.0',
  'Precision 3660': '2.37.1',
  'Precision 3680 Tower': '1.26.1',
  'Precision 5470': '1.39.0',
  'Precision 5480': '1.27.0',
  'Precision 5490': '1.21.1',
  'Precision 5560': '1.46.0',
  'Precision 5570': '1.41.0',
  'Precision 5680': '1.29.0',
  'Precision 5690': '1.23.0',
  'Precision 5770': '1.40.0',
  'Precision 5860 Tower': '3.8.0',
  'Precision 7560': '1.47.0',
  'Precision 7670': '1.38.0',
  'Precision 7680': '1.29.0',
  'Precision 7760': '1.47.0',
  'Precision 7770': '1.38.0',
  'Precision 7780': '1.29.0',
  'Precision 7875 Tower': '02.10.01',
  'Precision 7960 Tower': '2.20.0',
  'Precision Tower 7865': '1.26.0',
  'Dell Pro Micro QCM1255': '1.13.0',
  'Dell Pro Slim QCS1255': '1.13.0',
  'Dell Pro Tower QCT1255': '1.13.0',
  'Vostro 14 3420': '1.41.0',
  'Vostro 14 3430': '1.32.0',
  'Vostro 14 3440': '1.22.0',
  'Vostro 15 3510': '1.46.0',
  'Vostro 15 3520': '1.41.0',
  'Vostro 15 3530': '1.32.0',
  'Vostro 16 5630': '1.29.0',
  'Vostro 16 5640': '1.21.0',
  'Vostro 3020 Small Desktop': '1.36.0',
  'Vostro 3020 Tower Desktop': '1.36.0',
  'Vostro 3030': '1.26.0',
  'Vostro 3030S': '1.26.0',
  'Vostro 3910': '1.40.0',
  'Vostro 5620': '1.36.0',
  'Vostro 5890': '1.42.0',
  'Vostro 7620': '1.37.0',
  'XPS 13 9315': '1.38.0',
  'XPS 13 9340': '1.26.0',
  'XPS 13 9350': '1.21.0',
  'XPS 13 Plus 9320': '2.30.0',
  'XPS 14 (Dell 14 Premium) DA14250': '1.11.0',
  'XPS 14 9440': '1.24.0',
  'XPS 15 9510': '1.46.0',
  'XPS 15 9520': '1.41.0',
  'XPS 15 9530': '1.31.0',
  'XPS 16 (Dell 16 Premium) DA16250': '1.13.0',
  'XPS 16 9640': '1.23.0',
  'XPS 17 9720': '1.40.0',
  'XPS 17 9730': '1.27.0',
  'XPS 9320': '2.30.0'
};

var fix = model_fixes[model];
if (isnull(fix))
{
  foreach var key (keys(model_fixes))
  {
    if (key >< model)
    {
      fix = model_fixes[key];
      break;
    }
  }
}
if (isnull(fix))
  audit(AUDIT_HOST_NOT, 'an affected model');

var constraints = [{ 'fixed_version' : fix, 'fixed_display': fix + ' for ' + model }];
app_info.app = 'Dell System BIOS for ' + model;

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);