Security Updates for Microsoft Office Products (September 2026)

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

include('compat.inc');

if (description)
{
  script_id(344286);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/09");

  script_cve_id(
    "CVE-2026-64918",
    "CVE-2026-69285",
    "CVE-2026-69442",
    "CVE-2026-69529",
    "CVE-2026-69626",
    "CVE-2026-69734",
    "CVE-2026-69739",
    "CVE-2026-69764",
    "CVE-2026-69778",
    "CVE-2026-72974",
    "CVE-2026-78505",
    "CVE-2026-78510",
    "CVE-2026-78512",
    "CVE-2026-78515",
    "CVE-2026-78518",
    "CVE-2026-78524",
    "CVE-2026-78526",
    "CVE-2026-80084",
    "CVE-2026-80087",
    "CVE-2026-80088",
    "CVE-2026-80089",
    "CVE-2026-80091",
    "CVE-2026-81386",
    "CVE-2026-81387",
    "CVE-2026-81388",
    "CVE-2026-81389",
    "CVE-2026-81390",
    "CVE-2026-81391",
    "CVE-2026-81392",
    "CVE-2026-81393",
    "CVE-2026-81394",
    "CVE-2026-81395",
    "CVE-2026-81396",
    "CVE-2026-81397",
    "CVE-2026-81398",
    "CVE-2026-81399",
    "CVE-2026-81400",
    "CVE-2026-81401",
    "CVE-2026-81947",
    "CVE-2026-81948",
    "CVE-2026-81949",
    "CVE-2026-81950",
    "CVE-2026-81951",
    "CVE-2026-81952",
    "CVE-2026-81953",
    "CVE-2026-81954",
    "CVE-2026-81955",
    "CVE-2026-81956",
    "CVE-2026-81957",
    "CVE-2026-81958",
    "CVE-2026-81959",
    "CVE-2026-81960",
    "CVE-2026-85875"
  );
  script_xref(name:"MSKB", value:"5002916");
  script_xref(name:"MSKB", value:"5002904");
  script_xref(name:"MSKB", value:"5002898");
  script_xref(name:"MSKB", value:"5002913");
  script_xref(name:"MSKB", value:"4011160");
  script_xref(name:"MSFT", value:"MS26-5002916");
  script_xref(name:"MSFT", value:"MS26-5002904");
  script_xref(name:"MSFT", value:"MS26-5002898");
  script_xref(name:"MSFT", value:"MS26-5002913");
  script_xref(name:"MSFT", value:"MS26-4011160");

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

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

  - Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform
    spoofing over a network. (CVE-2026-64918)

  - Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over
    a network. (CVE-2026-69285, CVE-2026-69442, CVE-2026-78505)

  - Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute
    code over a network. (CVE-2026-69529, CVE-2026-69778)

  - Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information over a
    network. (CVE-2026-69626)

  - Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to disclose
    information over a network. (CVE-2026-69734)

  - Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over
    a network. (CVE-2026-69739, CVE-2026-80089)

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code
    over a network. (CVE-2026-69764, CVE-2026-78510, CVE-2026-78526, CVE-2026-81952)

  - Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information
    over a network. (CVE-2026-72974)

  - Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code
    over a network. (CVE-2026-78512)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information
    over a network. (CVE-2026-78515)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a
    network. (CVE-2026-78518)

  - Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a
    network. (CVE-2026-78524)

  - Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose
    information over a network. (CVE-2026-80084)

  - Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to disclose
    information over a network. (CVE-2026-80087)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information
    over a network. (CVE-2026-80088)

  - Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose
    information over a network. (CVE-2026-80091)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code
    locally. (CVE-2026-81386, CVE-2026-81389, CVE-2026-81397, CVE-2026-81398, CVE-2026-81947,
    CVE-2026-81948, CVE-2026-81951, CVE-2026-81959, CVE-2026-81960)

  - Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel
    allows an unauthorized attacker to disclose information locally. (CVE-2026-81387, CVE-2026-81394)

  - Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute
    code locally. (CVE-2026-81388, CVE-2026-81396, CVE-2026-81953)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information
    locally. (CVE-2026-81390, CVE-2026-81392, CVE-2026-81393, CVE-2026-81395, CVE-2026-81400,
    CVE-2026-85875)

  - Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose
    information locally. (CVE-2026-81391, CVE-2026-81958)

  - Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information
    locally. (CVE-2026-81399)

  - Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an
    unauthorized attacker to disclose information locally. (CVE-2026-81401)

  - Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute
    code locally. (CVE-2026-81949)

  - Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-81950)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-81954)

  - Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to
    execute code over a network. (CVE-2026-81955)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code
    locally. (CVE-2026-81956, CVE-2026-81957)

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/5002916");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/5002904");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/5002898");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/5002913");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4011160");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
  - KB5002916
  - KB5002904
  - KB5002898
  - KB5002913
  - KB4011160");
  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-2026-78510");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-78510");

  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:office");
  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", "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 = ['5002916', '5002904', '5002898', '5002913', '4011160'];

var app_info = vcf::microsoft::office::get_app_info(app:'Microsoft Office', kbs:kbs, bulletin:bulletin, severity:SECURITY_HOLE);

var constraints = [
    {'product' : 'Microsoft Office 2016', 'kb':'5002916', 'file':'mso.dll', 'fixed_version': '16.0.5569.1003'},
    {'product' : 'Microsoft Office 2016', 'kb':'5002904', 'file':'chart.dll', 'fixed_version': '16.0.5569.1003'},
    {'product' : 'Microsoft Office 2016', 'kb':'5002898', 'file':'oart.dll', 'fixed_version': '16.0.5569.1000'},
    {'product' : 'Microsoft Office 2016', 'kb':'5002913', 'file':'acecore.dll', 'fixed_version': '16.0.5569.1000'},
    {'product' : 'Microsoft Office 2016', 'kb':'4011160', 'file':'wpft632.cnv', 'fixed_version': '2012.1600.5569.1000'}
];

vcf::microsoft::office::check_version_and_report(
  app_info:app_info,
  constraints:constraints,
  severity:SECURITY_HOLE,
  bulletin:bulletin,
  subproduct:'Office'
);