KB5099536: Windows Server 2025 Security Update (July 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(326849);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/14");

  script_cve_id(
    "CVE-2026-33842",
    "CVE-2026-34328",
    "CVE-2026-34346",
    "CVE-2026-34348",
    "CVE-2026-34349",
    "CVE-2026-40378",
    "CVE-2026-40400",
    "CVE-2026-40422",
    "CVE-2026-41087",
    "CVE-2026-42900",
    "CVE-2026-42975",
    "CVE-2026-42982",
    "CVE-2026-42990",
    "CVE-2026-44800",
    "CVE-2026-44806",
    "CVE-2026-48564",
    "CVE-2026-48571",
    "CVE-2026-48572",
    "CVE-2026-49162",
    "CVE-2026-49164",
    "CVE-2026-49165",
    "CVE-2026-49166",
    "CVE-2026-49167",
    "CVE-2026-49168",
    "CVE-2026-49169",
    "CVE-2026-49170",
    "CVE-2026-49171",
    "CVE-2026-49172",
    "CVE-2026-49174",
    "CVE-2026-49175",
    "CVE-2026-49176",
    "CVE-2026-49177",
    "CVE-2026-49178",
    "CVE-2026-49180",
    "CVE-2026-49181",
    "CVE-2026-49183",
    "CVE-2026-49184",
    "CVE-2026-49783",
    "CVE-2026-49784",
    "CVE-2026-49787",
    "CVE-2026-49788",
    "CVE-2026-49789",
    "CVE-2026-49790",
    "CVE-2026-49791",
    "CVE-2026-49792",
    "CVE-2026-49793",
    "CVE-2026-49794",
    "CVE-2026-49795",
    "CVE-2026-49796",
    "CVE-2026-49797",
    "CVE-2026-49798",
    "CVE-2026-49799",
    "CVE-2026-49800",
    "CVE-2026-49801",
    "CVE-2026-49802",
    "CVE-2026-49803",
    "CVE-2026-49804",
    "CVE-2026-49805",
    "CVE-2026-49806",
    "CVE-2026-49807",
    "CVE-2026-49808",
    "CVE-2026-50293",
    "CVE-2026-50294",
    "CVE-2026-50295",
    "CVE-2026-50296",
    "CVE-2026-50297",
    "CVE-2026-50298",
    "CVE-2026-50299",
    "CVE-2026-50300",
    "CVE-2026-50302",
    "CVE-2026-50303",
    "CVE-2026-50304",
    "CVE-2026-50305",
    "CVE-2026-50306",
    "CVE-2026-50307",
    "CVE-2026-50308",
    "CVE-2026-50309",
    "CVE-2026-50310",
    "CVE-2026-50311",
    "CVE-2026-50312",
    "CVE-2026-50313",
    "CVE-2026-50315",
    "CVE-2026-50316",
    "CVE-2026-50317",
    "CVE-2026-50318",
    "CVE-2026-50321",
    "CVE-2026-50322",
    "CVE-2026-50323",
    "CVE-2026-50324",
    "CVE-2026-50325",
    "CVE-2026-50326",
    "CVE-2026-50327",
    "CVE-2026-50328",
    "CVE-2026-50329",
    "CVE-2026-50330",
    "CVE-2026-50331",
    "CVE-2026-50332",
    "CVE-2026-50333",
    "CVE-2026-50334",
    "CVE-2026-50335",
    "CVE-2026-50337",
    "CVE-2026-50339",
    "CVE-2026-50340",
    "CVE-2026-50341",
    "CVE-2026-50343",
    "CVE-2026-50344",
    "CVE-2026-50345",
    "CVE-2026-50346",
    "CVE-2026-50347",
    "CVE-2026-50348",
    "CVE-2026-50350",
    "CVE-2026-50351",
    "CVE-2026-50352",
    "CVE-2026-50353",
    "CVE-2026-50354",
    "CVE-2026-50355",
    "CVE-2026-50356",
    "CVE-2026-50357",
    "CVE-2026-50358",
    "CVE-2026-50359",
    "CVE-2026-50360",
    "CVE-2026-50361",
    "CVE-2026-50362",
    "CVE-2026-50363",
    "CVE-2026-50365",
    "CVE-2026-50366",
    "CVE-2026-50367",
    "CVE-2026-50368",
    "CVE-2026-50369",
    "CVE-2026-50370",
    "CVE-2026-50371",
    "CVE-2026-50372",
    "CVE-2026-50373",
    "CVE-2026-50374",
    "CVE-2026-50375",
    "CVE-2026-50376",
    "CVE-2026-50377",
    "CVE-2026-50378",
    "CVE-2026-50380",
    "CVE-2026-50381",
    "CVE-2026-50382",
    "CVE-2026-50383",
    "CVE-2026-50384",
    "CVE-2026-50385",
    "CVE-2026-50386",
    "CVE-2026-50387",
    "CVE-2026-50388",
    "CVE-2026-50389",
    "CVE-2026-50390",
    "CVE-2026-50391",
    "CVE-2026-50392",
    "CVE-2026-50393",
    "CVE-2026-50394",
    "CVE-2026-50396",
    "CVE-2026-50397",
    "CVE-2026-50398",
    "CVE-2026-50399",
    "CVE-2026-50400",
    "CVE-2026-50401",
    "CVE-2026-50402",
    "CVE-2026-50403",
    "CVE-2026-50405",
    "CVE-2026-50407",
    "CVE-2026-50409",
    "CVE-2026-50410",
    "CVE-2026-50411",
    "CVE-2026-50412",
    "CVE-2026-50413",
    "CVE-2026-50414",
    "CVE-2026-50415",
    "CVE-2026-50416",
    "CVE-2026-50417",
    "CVE-2026-50418",
    "CVE-2026-50419",
    "CVE-2026-50420",
    "CVE-2026-50421",
    "CVE-2026-50422",
    "CVE-2026-50423",
    "CVE-2026-50424",
    "CVE-2026-50425",
    "CVE-2026-50426",
    "CVE-2026-50427",
    "CVE-2026-50429",
    "CVE-2026-50430",
    "CVE-2026-50431",
    "CVE-2026-50432",
    "CVE-2026-50433",
    "CVE-2026-50434",
    "CVE-2026-50435",
    "CVE-2026-50436",
    "CVE-2026-50437",
    "CVE-2026-50439",
    "CVE-2026-50441",
    "CVE-2026-50442",
    "CVE-2026-50444",
    "CVE-2026-50445",
    "CVE-2026-50447",
    "CVE-2026-50448",
    "CVE-2026-50449",
    "CVE-2026-50450",
    "CVE-2026-50451",
    "CVE-2026-50452",
    "CVE-2026-50453",
    "CVE-2026-50454",
    "CVE-2026-50455",
    "CVE-2026-50456",
    "CVE-2026-50457",
    "CVE-2026-50458",
    "CVE-2026-50459",
    "CVE-2026-50460",
    "CVE-2026-50461",
    "CVE-2026-50462",
    "CVE-2026-50463",
    "CVE-2026-50465",
    "CVE-2026-50466",
    "CVE-2026-50469",
    "CVE-2026-50470",
    "CVE-2026-50471",
    "CVE-2026-50473",
    "CVE-2026-50474",
    "CVE-2026-50475",
    "CVE-2026-50476",
    "CVE-2026-50477",
    "CVE-2026-50478",
    "CVE-2026-50479",
    "CVE-2026-50482",
    "CVE-2026-50483",
    "CVE-2026-50484",
    "CVE-2026-50485",
    "CVE-2026-50486",
    "CVE-2026-50487",
    "CVE-2026-50488",
    "CVE-2026-50489",
    "CVE-2026-50490",
    "CVE-2026-50491",
    "CVE-2026-50492",
    "CVE-2026-50493",
    "CVE-2026-50494",
    "CVE-2026-50495",
    "CVE-2026-50496",
    "CVE-2026-50497",
    "CVE-2026-50498",
    "CVE-2026-50499",
    "CVE-2026-50500",
    "CVE-2026-50501",
    "CVE-2026-50502",
    "CVE-2026-50503",
    "CVE-2026-50504",
    "CVE-2026-50505",
    "CVE-2026-50509",
    "CVE-2026-50518",
    "CVE-2026-50647",
    "CVE-2026-50655",
    "CVE-2026-50661",
    "CVE-2026-50666",
    "CVE-2026-50667",
    "CVE-2026-50668",
    "CVE-2026-50669",
    "CVE-2026-50670",
    "CVE-2026-50672",
    "CVE-2026-50673",
    "CVE-2026-50674",
    "CVE-2026-50679",
    "CVE-2026-50680",
    "CVE-2026-50681",
    "CVE-2026-50682",
    "CVE-2026-50683",
    "CVE-2026-50684",
    "CVE-2026-50685",
    "CVE-2026-50686",
    "CVE-2026-50687",
    "CVE-2026-50688",
    "CVE-2026-50689",
    "CVE-2026-50690",
    "CVE-2026-50692",
    "CVE-2026-50694",
    "CVE-2026-50695",
    "CVE-2026-50696",
    "CVE-2026-50697",
    "CVE-2026-54107",
    "CVE-2026-54109",
    "CVE-2026-54111",
    "CVE-2026-54112",
    "CVE-2026-54114",
    "CVE-2026-54115",
    "CVE-2026-54119",
    "CVE-2026-54121",
    "CVE-2026-54122",
    "CVE-2026-54124",
    "CVE-2026-54125",
    "CVE-2026-54126",
    "CVE-2026-54127",
    "CVE-2026-54128",
    "CVE-2026-54129",
    "CVE-2026-54982",
    "CVE-2026-54983",
    "CVE-2026-54986",
    "CVE-2026-54987",
    "CVE-2026-54989",
    "CVE-2026-54990",
    "CVE-2026-54991",
    "CVE-2026-54992",
    "CVE-2026-54993",
    "CVE-2026-54995",
    "CVE-2026-54996",
    "CVE-2026-54997",
    "CVE-2026-54999",
    "CVE-2026-55000",
    "CVE-2026-55001",
    "CVE-2026-55003",
    "CVE-2026-55004",
    "CVE-2026-55144",
    "CVE-2026-56155",
    "CVE-2026-56159",
    "CVE-2026-56168",
    "CVE-2026-56173",
    "CVE-2026-56175",
    "CVE-2026-56176",
    "CVE-2026-56181",
    "CVE-2026-56182",
    "CVE-2026-56184",
    "CVE-2026-56186",
    "CVE-2026-56188",
    "CVE-2026-56189",
    "CVE-2026-56190",
    "CVE-2026-56194",
    "CVE-2026-56643",
    "CVE-2026-56644",
    "CVE-2026-56647",
    "CVE-2026-56648",
    "CVE-2026-56649",
    "CVE-2026-56650",
    "CVE-2026-57083",
    "CVE-2026-57084",
    "CVE-2026-57085",
    "CVE-2026-57087",
    "CVE-2026-57088",
    "CVE-2026-57089",
    "CVE-2026-57090",
    "CVE-2026-57091",
    "CVE-2026-57092",
    "CVE-2026-57093",
    "CVE-2026-57094",
    "CVE-2026-57095",
    "CVE-2026-57096",
    "CVE-2026-57097",
    "CVE-2026-57976",
    "CVE-2026-57979",
    "CVE-2026-57982",
    "CVE-2026-58526",
    "CVE-2026-58527",
    "CVE-2026-58528",
    "CVE-2026-58530",
    "CVE-2026-58531",
    "CVE-2026-58532",
    "CVE-2026-58533",
    "CVE-2026-58534",
    "CVE-2026-58535",
    "CVE-2026-58536",
    "CVE-2026-58537",
    "CVE-2026-58538",
    "CVE-2026-58539",
    "CVE-2026-58540",
    "CVE-2026-58541",
    "CVE-2026-58542",
    "CVE-2026-58543",
    "CVE-2026-58544",
    "CVE-2026-58545",
    "CVE-2026-58546",
    "CVE-2026-58547",
    "CVE-2026-58594",
    "CVE-2026-58601",
    "CVE-2026-58602",
    "CVE-2026-58608",
    "CVE-2026-58609",
    "CVE-2026-58610",
    "CVE-2026-58613",
    "CVE-2026-58614",
    "CVE-2026-58619",
    "CVE-2026-58626",
    "CVE-2026-58627",
    "CVE-2026-58628",
    "CVE-2026-58629",
    "CVE-2026-58632",
    "CVE-2026-58635",
    "CVE-2026-58637",
    "CVE-2026-58638",
    "CVE-2026-58640"
  );
  script_xref(name:"MSKB", value:"5099536");
  script_xref(name:"MSFT", value:"MS26-5099536");

  script_name(english:"KB5099536: Windows Server 2025 Security Update (July 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host is missing security update 5099536. It is, therefore, affected by multiple vulnerabilities

  - Integer overflow or wraparound in Windows RDP allows an unauthorized attacker to execute code over a
    network. (CVE-2026-58594)

  - Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a
    network. (CVE-2026-49172)

  - Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized
    attacker to elevate privileges locally. (CVE-2026-42982)

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/5099536");
  script_set_attribute(attribute:"solution", value:
"Apply Security Update 5099536");
  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:N/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-2026-58594");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-49172");

  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:"2026/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_server_2025");
  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_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

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

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

var bulletin = 'MS26-07';
var kbs = make_list(
  '5099536'
);

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(win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

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

# This plugin is for Windows Server 2025 only (version 4th component >= 32000)
# Windows 11 24H2/25H2 systems (< 32000) should use the KB5101650 plugin instead
var os_build = get_kb_item('SMB/WindowsVersionBuild');
var os_name = get_kb_item("SMB/ProductName");
if (os_build == '26100')
{
  var systemroot = hotfix_get_systemroot();
  var path = hotfix_append_path(path:systemroot + "\system32", value:"ntoskrnl.exe");
  var fver = hotfix_get_fversion(path:path);
  if (!isnull(fver) && fver['error'] == HCF_OK && !isnull(fver['version']))
  {
    var ver_parts = split(fver['version'], sep:'.', keep:FALSE);
    if ((max_index(ver_parts) >= 4 && int(ver_parts[3]) < 32000) && ('server' >!< tolower(os_name)))
    {
      # Windows 11 24H2/25H2 system - this plugin doesn't apply (use KB5101650)
      hotfix_check_fversion_end();
      audit(AUDIT_HOST_NOT, 'affected (Windows 11 - use KB5101650)');
    }
  }
}

if (
  smb_check_rollup(os:'10',
                   os_build:26100,
                   rollup_date:'07_2026',
                   bulletin:bulletin,
                   rollup_kb_list:[5099536])
)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, hotfix_get_audit_report());
}