Security Updates for Microsoft Word Products (September 2026)

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

include('compat.inc');

if (description)
{
  script_id(344290);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/09");

  script_cve_id(
    "CVE-2026-62804",
    "CVE-2026-69556",
    "CVE-2026-69671",
    "CVE-2026-69686",
    "CVE-2026-69719",
    "CVE-2026-69722",
    "CVE-2026-69759",
    "CVE-2026-69764",
    "CVE-2026-72972",
    "CVE-2026-72973",
    "CVE-2026-72976",
    "CVE-2026-77901",
    "CVE-2026-77911",
    "CVE-2026-78502",
    "CVE-2026-78503",
    "CVE-2026-78504",
    "CVE-2026-78506",
    "CVE-2026-78509",
    "CVE-2026-78511",
    "CVE-2026-78514",
    "CVE-2026-78517",
    "CVE-2026-78520",
    "CVE-2026-78521",
    "CVE-2026-78522",
    "CVE-2026-78525",
    "CVE-2026-80079",
    "CVE-2026-80080",
    "CVE-2026-80085",
    "CVE-2026-80090",
    "CVE-2026-83949",
    "CVE-2026-83951"
  );
  script_xref(name:"MSKB", value:"5002923");
  script_xref(name:"MSFT", value:"MS26-5002923");

  script_name(english:"Security Updates for Microsoft Word Products (September 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Products are missing a security update. They are, therefore, affected by multiple vulnerabilities:

  - External control of file name or path in Microsoft Office Word allows an unauthorized attacker to
    execute code locally. (CVE-2026-62804)

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code
    over a network. (CVE-2026-69556, CVE-2026-69671, CVE-2026-69764, CVE-2026-72972, CVE-2026-72973,
    CVE-2026-78511, CVE-2026-78517, CVE-2026-78521, CVE-2026-80085)

  - Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code
    over a network. (CVE-2026-69686, CVE-2026-69722, CVE-2026-69759, CVE-2026-78504)

  - Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information
    over a network. (CVE-2026-69719)

  - Out-of-bounds read in Microsoft Office Word allows an authorized attacker to disclose information
    locally. (CVE-2026-72976)

  - Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code
    over a network. (CVE-2026-77901)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information
    over a network. (CVE-2026-77911, CVE-2026-78502, CVE-2026-78503, CVE-2026-78522, CVE-2026-80079,
    CVE-2026-80090)

  - Improper null termination in Microsoft Office Word allows an unauthorized attacker to disclose
    information locally. (CVE-2026-78506)

  - Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute
    code over a network. (CVE-2026-78509)

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a
    network. (CVE-2026-78514)

  - Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code over
    a network. (CVE-2026-78520)

  - Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a
    network. (CVE-2026-78525)

  - Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
    (CVE-2026-80080)

  - Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information
    locally. (CVE-2026-83949, CVE-2026-83951)

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/en-us/help/5002923");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released KB5002923 to address this issue.");
  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-2026-78509");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-78509");

  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:"2026/09/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  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("office_installed.nasl", "microsoft_office_compatibility_pack_installed.nbin", "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('vcf_extras_office.inc');

var bulletin = 'MS26-09';
var kbs = ['5002923'];

var constraints = [
    { 'kb':'5002923', 'channel':'MSI', 'fixed_version': '16.0.5569.1000', 'sp' : 0}
];

vcf::microsoft::office_product::check_version_and_report(
  kbs:kbs,
  constraints:constraints,
  severity:SECURITY_HOLE,
  bulletin:bulletin,
  subproduct:'Word'
);