Microsoft .NET Framework (October 2026)

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#
##

include('compat.inc');

if (description)
{
  script_id(366093);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/16");

  script_cve_id(
    "CVE-2026-58280",
    "CVE-2026-69651",
    "CVE-2026-70007",
    "CVE-2026-70035",
    "CVE-2026-70174",
    "CVE-2026-83520",
    "CVE-2026-84008",
    "CVE-2026-85363",
    "CVE-2026-96222",
    "CVE-2026-96224",
    "CVE-2026-96233",
    "CVE-2026-96958",
    "CVE-2026-96959",
    "CVE-2026-96960",
    "CVE-2026-97788",
    "CVE-2026-97801",
    "CVE-2026-102869",
    "CVE-2026-108398"
  );
  script_xref(name:"MSKB", value:"5126868");
  script_xref(name:"MSKB", value:"5127660");
  script_xref(name:"MSKB", value:"5127664");
  script_xref(name:"MSKB", value:"5127666");
  script_xref(name:"MSKB", value:"5127667");
  script_xref(name:"MSKB", value:"5127668");
  script_xref(name:"MSKB", value:"5127683");
  script_xref(name:"MSKB", value:"5127684");
  script_xref(name:"MSKB", value:"5127685");
  script_xref(name:"MSKB", value:"5127686");
  script_xref(name:"MSKB", value:"5127687");
  script_xref(name:"MSKB", value:"5127688");
  script_xref(name:"MSKB", value:"5127689");
  script_xref(name:"MSKB", value:"5127690");
  script_xref(name:"MSKB", value:"5127691");
  script_xref(name:"MSKB", value:"5127692");
  script_xref(name:"MSKB", value:"5127693");
  script_xref(name:"MSKB", value:"5127694");
  script_xref(name:"MSKB", value:"5127696");
  script_xref(name:"MSFT", value:"MS26-5126868");
  script_xref(name:"MSFT", value:"MS26-5127660");
  script_xref(name:"MSFT", value:"MS26-5127664");
  script_xref(name:"MSFT", value:"MS26-5127666");
  script_xref(name:"MSFT", value:"MS26-5127667");
  script_xref(name:"MSFT", value:"MS26-5127668");
  script_xref(name:"MSFT", value:"MS26-5127683");
  script_xref(name:"MSFT", value:"MS26-5127684");
  script_xref(name:"MSFT", value:"MS26-5127685");
  script_xref(name:"MSFT", value:"MS26-5127686");
  script_xref(name:"MSFT", value:"MS26-5127687");
  script_xref(name:"MSFT", value:"MS26-5127688");
  script_xref(name:"MSFT", value:"MS26-5127689");
  script_xref(name:"MSFT", value:"MS26-5127690");
  script_xref(name:"MSFT", value:"MS26-5127691");
  script_xref(name:"MSFT", value:"MS26-5127692");
  script_xref(name:"MSFT", value:"MS26-5127693");
  script_xref(name:"MSFT", value:"MS26-5127694");
  script_xref(name:"MSFT", value:"MS26-5127696");
  script_xref(name:"IAVA", value:"2026-A-1125");
  script_xref(name:"IAVA", value:"2026-A-1126");

  script_name(english:"Microsoft .NET Framework (October 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft .NET Framework installation on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft .NET Framework installation on the remote host is missing a security update. It is, therefore, affected by
multiple vulnerabilities, including the following:

  - Out-of-bounds write in .NET Framework allows an unauthorized attacker to execute code over a network.
    (CVE-2026-70007)

  - Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a
    network. (CVE-2026-70035)

  - Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code
    over a network. (CVE-2026-70174)

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://support.microsoft.com/help/5126868");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127660");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127664");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127666");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127667");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127668");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127683");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127684");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127685");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127686");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127687");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127688");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127689");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127690");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127691");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127692");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127693");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127694");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5127696");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address these issues:
  -KB5126868
  -KB5127660
  -KB5127664
  -KB5127666
  -KB5127667
  -KB5127668
  -KB5127683
  -KB5127684
  -KB5127685
  -KB5127686
  -KB5127687
  -KB5127688
  -KB5127689
  -KB5127690
  -KB5127691
  -KB5127692
  -KB5127693
  -KB5127694
  -KB5127696");
  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-2026-96224");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(190, 203, 295, 358, 405, 407, 426, 502, 674, 770, 787, 843, 1287);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:.net_framework");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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_check_dotnet_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl", "microsoft_net_framework_installed.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include('install_func.inc');
include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

var bulletin = 'MS26-10';
var kbs = make_list(
  '5126868',
  '5127660',
  '5127664',
  '5127666',
  '5127667',
  '5127668',
  '5127683',
  '5127684',
  '5127685',
  '5127686',
  '5127687',
  '5127688',
  '5127689',
  '5127690',
  '5127691',
  '5127692',
  '5127693',
  '5127694',
  '5127696'
);

if (get_kb_item('Host/patch_management_checks')) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

get_kb_item_or_exit('SMB/Registry/Enumerated');
get_kb_item_or_exit('SMB/WindowsVersion', exit_code:1);

if (hotfix_check_sp_range(win8:'0', win81:'0', win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

var share = hotfix_get_systemdrive(exit_on_fail:TRUE, as_share:TRUE);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);

var app = 'Microsoft .NET Framework';
get_install_count(app_name:app, exit_if_zero:TRUE);
var installs = get_combined_installs(app_name:app);

var install, version;
var vuln = 0;

if (installs[0] == 0)
{
  foreach install (installs[1])
  {
    version = install['version'];
    if( version != UNKNOWN_VER &&
        smb_check_dotnet_rollup(rollup_date:'10_2026', dotnet_ver:version))
      vuln++;
  }
}
if(vuln)
{
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}