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Security Update for Microsoft .NET Core SDK (October 2026)

🗓️ 16 Oct 2026 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 2 Views

Multiple vulnerabilities in Microsoft .NET Core SDK allow remote code execution or tampering.

Related
Refs
Code
ReporterTitlePublishedViews
Family
alpinelinux
AlpineLinux		CVE-2026-105016
13 Oct 202619:01
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-58280
13 Oct 202619:01
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-66822
13 Oct 202618:59
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-69651
13 Oct 202618:59
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-70007
13 Oct 202619:01
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-70035
13 Oct 202619:01
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-70159
13 Oct 202619:00
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-70161
13 Oct 202619:00
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-70162
13 Oct 202619:01
–alpinelinux
alpinelinux
AlpineLinux		CVE-2026-70165
13 Oct 202619:00
–alpinelinux
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(366547);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/16");

  script_cve_id(
    "CVE-2026-58280",
    "CVE-2026-66822",
    "CVE-2026-69651",
    "CVE-2026-70007",
    "CVE-2026-70035",
    "CVE-2026-70159",
    "CVE-2026-70161",
    "CVE-2026-70162",
    "CVE-2026-70165",
    "CVE-2026-70174",
    "CVE-2026-70175",
    "CVE-2026-70179",
    "CVE-2026-70181",
    "CVE-2026-70183",
    "CVE-2026-70186",
    "CVE-2026-70188",
    "CVE-2026-70190",
    "CVE-2026-70196",
    "CVE-2026-70197",
    "CVE-2026-83520",
    "CVE-2026-84008",
    "CVE-2026-85363",
    "CVE-2026-85790",
    "CVE-2026-87697",
    "CVE-2026-88092",
    "CVE-2026-92707",
    "CVE-2026-96222",
    "CVE-2026-96224",
    "CVE-2026-96225",
    "CVE-2026-96229",
    "CVE-2026-96230",
    "CVE-2026-96231",
    "CVE-2026-96232",
    "CVE-2026-96233",
    "CVE-2026-96234",
    "CVE-2026-96235",
    "CVE-2026-96236",
    "CVE-2026-96237",
    "CVE-2026-96238",
    "CVE-2026-96957",
    "CVE-2026-96958",
    "CVE-2026-96959",
    "CVE-2026-96960",
    "CVE-2026-102870",
    "CVE-2026-105016"
  );
  script_xref(name:"IAVA", value:"2026-A-1124");

  script_name(english:"Security Update for Microsoft .NET Core SDK (October 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft .NET Core SDK installations on the remote host are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft .NET Core SDK installations on the remote host are missing a security update. It is, therefore, affected by
multiple vulnerabilities as referenced in the vendor advisory.

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an
    unauthorized attacker to bypass a security feature over a network. (CVE-2026-70188)

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an
    unauthorized attacker to perform tampering over a network. (CVE-2026-88092)

  - Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a
    network. (CVE-2026-105016)

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://github.com/dotnet/announcements/issues/445");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/446");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/447");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/448");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/449");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/450");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/451");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/452");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/453");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/454");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/455");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/456");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/457");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/458");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/459");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/460");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/461");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/462");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/463");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/465");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/466");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/467");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/468");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/469");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/470");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/471");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/472");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/473");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/474");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/475");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/476");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/477");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/478");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/479");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/480");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/481");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/482");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/483");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/484");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/485");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/486");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/487");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/488");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/489");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/490");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5130034");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5130035");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5130036");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet/8.0");
  # https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.2/8.0.102.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b4db1380");
  # https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.2/8.0.201.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?76fce2a9");
  # https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.5/8.0.105.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bc3427ff");
  # https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.5/8.0.205.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6386e47d");
  # https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.32/8.0.132.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0aa98c15");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet/9.0");
  # https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.21/9.0.122.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cc08b6bc");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet/10.0");
  # https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.13/10.0.13.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4756b61b");
  script_set_attribute(attribute:"solution", value:
"Update .NET Core, remove vulnerable packages and refer to vendor advisory.");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-105016");

  script_cwe_id(22, 59, 79, 94, 122, 125, 183, 190, 201, 290, 295, 346, 347, 358, 362, 405, 416, 444, 502, 640, 674, 770, 787, 829, 833, 1325);

  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:"2026/10/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:.net_core");
  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("microsoft_dotnet_core_sdk_win.nbin");
  script_require_keys("installed_sw/.NET Core SDK Windows", "Settings/ParanoidReport");

  exit(0);
}

include('vdf.inc');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [{'scope': 'target', 'match': {'os': 'windows', 'paranoia': true}}],
  'checks': [{
    'product': {'name': '.NET Core SDK Windows', 'type': 'app'},
    'check_algorithm': 'default',
    'constraints': [{
      'min_version': '8',
      'fixed_version': '8.0.132',
      'report': {'cves': [
        'CVE-2026-58280','CVE-2026-66822','CVE-2026-69651','CVE-2026-70007','CVE-2026-70035','CVE-2026-70159',
        'CVE-2026-70174','CVE-2026-70175','CVE-2026-70179','CVE-2026-70181','CVE-2026-70183','CVE-2026-70186',
        'CVE-2026-70188','CVE-2026-70196','CVE-2026-70197','CVE-2026-83520','CVE-2026-85363','CVE-2026-87697',
        'CVE-2026-88092','CVE-2026-92707','CVE-2026-96224','CVE-2026-96225','CVE-2026-96229','CVE-2026-96230',
        'CVE-2026-96231','CVE-2026-96232','CVE-2026-96233','CVE-2026-96234','CVE-2026-96235','CVE-2026-96236',
        'CVE-2026-96237','CVE-2026-96238','CVE-2026-96958','CVE-2026-96959','CVE-2026-96960','CVE-2026-96222',
        'CVE-2026-70162','CVE-2026-84008','CVE-2026-105016'
      ]}
    },{
      'min_version': '8.0.400',
      'fixed_version': '8.0.426',
      'report': {'cves': [
        'CVE-2026-58280', 'CVE-2026-66822', 'CVE-2026-69651', 'CVE-2026-70007', 'CVE-2026-70035', 'CVE-2026-70159',
        'CVE-2026-70174', 'CVE-2026-70175', 'CVE-2026-70179', 'CVE-2026-70181', 'CVE-2026-70183', 'CVE-2026-70186',
        'CVE-2026-70188', 'CVE-2026-70196', 'CVE-2026-70197', 'CVE-2026-83520', 'CVE-2026-85363', 'CVE-2026-87697',
        'CVE-2026-88092', 'CVE-2026-92707', 'CVE-2026-96224', 'CVE-2026-96225', 'CVE-2026-96229', 'CVE-2026-96230',
        'CVE-2026-96231', 'CVE-2026-96232', 'CVE-2026-96233', 'CVE-2026-96234', 'CVE-2026-96235', 'CVE-2026-96236',
        'CVE-2026-96237', 'CVE-2026-96238', 'CVE-2026-96958', 'CVE-2026-96959', 'CVE-2026-96960', 'CVE-2026-96222',
        'CVE-2026-70162', 'CVE-2026-84008', 'CVE-2026-105016'
      ]}
    },{
      'min_version': '9',
      'fixed_version': '9.0.122',
      'report': {'cves': [
        'CVE-2026-58280','CVE-2026-66822','CVE-2026-69651','CVE-2026-70007','CVE-2026-70035','CVE-2026-70159',
        'CVE-2026-70162','CVE-2026-70174','CVE-2026-70175','CVE-2026-70179','CVE-2026-70181','CVE-2026-70183',
        'CVE-2026-70186','CVE-2026-70188','CVE-2026-70196','CVE-2026-70197','CVE-2026-83520','CVE-2026-84008',
        'CVE-2026-85363','CVE-2026-85790','CVE-2026-87697','CVE-2026-88092','CVE-2026-92707','CVE-2026-96224',
        'CVE-2026-96225','CVE-2026-96229','CVE-2026-96230','CVE-2026-96231','CVE-2026-96232','CVE-2026-96233',
        'CVE-2026-96234','CVE-2026-96235','CVE-2026-96236','CVE-2026-96237','CVE-2026-96238','CVE-2026-96958',
        'CVE-2026-96959','CVE-2026-96960','CVE-2026-105016'
      ]}
    },{
      'min_version': '9.0.300',
      'fixed_version': '9.0.319',
      'report': {'cves': [
        'CVE-2026-58280','CVE-2026-66822','CVE-2026-69651','CVE-2026-70007','CVE-2026-70035','CVE-2026-70159',
        'CVE-2026-70162','CVE-2026-70174','CVE-2026-70175','CVE-2026-70179','CVE-2026-70181','CVE-2026-70183',
        'CVE-2026-70186','CVE-2026-70188','CVE-2026-70196','CVE-2026-70197','CVE-2026-83520','CVE-2026-84008',
        'CVE-2026-85363','CVE-2026-85790','CVE-2026-87697','CVE-2026-88092','CVE-2026-92707','CVE-2026-96224',
        'CVE-2026-96225','CVE-2026-96229','CVE-2026-96230','CVE-2026-96231','CVE-2026-96232','CVE-2026-96233',
        'CVE-2026-96234','CVE-2026-96235','CVE-2026-96236','CVE-2026-96237','CVE-2026-96238','CVE-2026-96958',
        'CVE-2026-96959','CVE-2026-96960','CVE-2026-105016'
      ]}
    },{
      'min_version': '10',
      'fixed_version': '10.0.113',
      'report': {'cves': [
        'CVE-2026-58280','CVE-2026-66822','CVE-2026-69651','CVE-2026-70007','CVE-2026-70035','CVE-2026-70159',
        'CVE-2026-70161','CVE-2026-70162','CVE-2026-70165','CVE-2026-70174','CVE-2026-70175','CVE-2026-70179',
        'CVE-2026-70181','CVE-2026-70183','CVE-2026-70186','CVE-2026-70188','CVE-2026-70190','CVE-2026-70196',
        'CVE-2026-70197','CVE-2026-83520','CVE-2026-84008','CVE-2026-85363','CVE-2026-87697','CVE-2026-88092',
        'CVE-2026-92707','CVE-2026-96224','CVE-2026-96225','CVE-2026-96229','CVE-2026-96230','CVE-2026-96231',
        'CVE-2026-96232','CVE-2026-96233','CVE-2026-96234','CVE-2026-96235','CVE-2026-96236','CVE-2026-96237',
        'CVE-2026-96238','CVE-2026-96957','CVE-2026-96958','CVE-2026-96959','CVE-2026-96960','CVE-2026-102870',
        'CVE-2026-105016'
      ]}
    },{
      'min_version': '10.0.300',
      'fixed_version': '10.0.402',
      'report': {'cves': [
        'CVE-2026-58280','CVE-2026-66822','CVE-2026-69651','CVE-2026-70007','CVE-2026-70035','CVE-2026-70159',
        'CVE-2026-70161','CVE-2026-70162','CVE-2026-70165','CVE-2026-70174','CVE-2026-70175','CVE-2026-70179',
        'CVE-2026-70181','CVE-2026-70183','CVE-2026-70186','CVE-2026-70188','CVE-2026-70190','CVE-2026-70196',
        'CVE-2026-70197','CVE-2026-83520','CVE-2026-84008','CVE-2026-85363','CVE-2026-87697','CVE-2026-88092',
        'CVE-2026-92707','CVE-2026-96224','CVE-2026-96225','CVE-2026-96229','CVE-2026-96230','CVE-2026-96231',
        'CVE-2026-96232','CVE-2026-96233','CVE-2026-96234','CVE-2026-96235','CVE-2026-96236','CVE-2026-96237',
        'CVE-2026-96238','CVE-2026-96957','CVE-2026-96958','CVE-2026-96959','CVE-2026-96960','CVE-2026-102870',
        'CVE-2026-105016'
      ]}
    }]
  }]
};

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

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16 Oct 2026 00:00Current
7High risk
Vulners AI Score7
CVSS 3.19.8
EPSS0.01266
SSVC
Microsoft .NET Core SDKASP.NET CoreMicrosoft QUIChttp request/response smugglingheap-based buffer overflowremote code execution
2