Security Updates for Microsoft Office Products C2R (October 2026)

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

include('compat.inc');

if (description)
{
  script_id(365620);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/14");

  script_cve_id(
    "CVE-2026-70096",
    "CVE-2026-70214",
    "CVE-2026-70219",
    "CVE-2026-70254",
    "CVE-2026-70269",
    "CVE-2026-70276",
    "CVE-2026-70281",
    "CVE-2026-70300",
    "CVE-2026-77902",
    "CVE-2026-85340",
    "CVE-2026-88144",
    "CVE-2026-88145",
    "CVE-2026-88151",
    "CVE-2026-88153",
    "CVE-2026-88154",
    "CVE-2026-88156",
    "CVE-2026-88169",
    "CVE-2026-88172",
    "CVE-2026-88175",
    "CVE-2026-88183",
    "CVE-2026-88184",
    "CVE-2026-88185",
    "CVE-2026-88190",
    "CVE-2026-88192",
    "CVE-2026-88195",
    "CVE-2026-88196",
    "CVE-2026-88197",
    "CVE-2026-88201",
    "CVE-2026-96996",
    "CVE-2026-97001",
    "CVE-2026-97009",
    "CVE-2026-97014",
    "CVE-2026-102858",
    "CVE-2026-102867",
    "CVE-2026-105599",
    "CVE-2026-105715"
  );

  script_name(english:"Security Updates for Microsoft Office Products C2R (October 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 security updates. It is, therefore, affected by multiple
vulnerabilities:

  - Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a
    network. (CVE-2026-88196, CVE-2026-88197)

  - Heap-based buffer overflow in Windows Rich Text Edit Control allows an unauthorized attacker to execute
    code over a network. (CVE-2026-70096)

  - Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over
    a network. (CVE-2026-70300)

  - Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code
    over a network. (CVE-2026-88156)

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a
    network. (CVE-2026-70269, CVE-2026-88185)

  - Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code
    over a network. (CVE-2026-105715)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a
    network. (CVE-2026-77902, CVE-2026-88145)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a
    network. (CVE-2026-70254)

  - Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a
    network. (CVE-2026-88144)

  - Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code
    over a network. (CVE-2026-105599)

  - Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over
    a network. (CVE-2026-102858)

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code
    locally. (CVE-2026-96996, CVE-2026-97001)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code
    locally. (CVE-2026-97009)

  - Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges
    locally. (CVE-2026-70276, CVE-2026-85340)

  - Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over
    a network. (CVE-2026-70281)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a
    network. (CVE-2026-70219, CVE-2026-88151, CVE-2026-88153, CVE-2026-88154, CVE-2026-88172,
    CVE-2026-88175, CVE-2026-88184, CVE-2026-88190, CVE-2026-88192)

  - Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a
    network. (CVE-2026-88195, CVE-2026-88201)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a
    network. (CVE-2026-88169, CVE-2026-102867)

  - Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information
    over a network. (CVE-2026-88183)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information
    locally. (CVE-2026-70214, CVE-2026-97014)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5931548c");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released patches to address these issues.

For Office 365, Office 2016 C2R, or Office 2019, 2021 or 2024,
ensure automatic updates are enabled or open any office app
and manually perform an update.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A: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_attribute(attribute:"cvss_score_source", value:"CVE-2026-70096");

  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:"2026/10/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  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("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 = 'MS26-10';

var app_info = vcf::microsoft::office::get_app_info(app:'Microsoft Office');

var constraints = [
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20430.20182','channel':'Current'},
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20430.20180','channel':'Enterprise Deferred','channel_version':'2609'},
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20326.20232','channel':'Enterprise Deferred','channel_version':'2608'},
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20228.20276','channel':'Enterprise Deferred'},
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20430.20178','channel':'Deferred','channel_version':'2609'},
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20326.20230','channel':'Deferred','channel_version':'2608'},
  {'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.20228.20274','channel':'Deferred'},
  {'product':'Microsoft Office 2024','file':'graph.exe','fixed_version':'16.0.20430.20182','channel':'2024 Retail'},
  {'product':'Microsoft Office 2021','file':'graph.exe','fixed_version':'16.0.20326.20232','channel':'2021 Retail'},
  {'product':'Microsoft Office 2024','file':'graph.exe','fixed_version':'16.0.17932.21056','channel':'LTSC 2024'},
  {'product':'Microsoft Office 2021','file':'graph.exe','fixed_version':'16.0.14334.20974','channel':'LTSC 2021'},
  {'product':'Microsoft Office 2019','file':'graph.exe','fixed_version':'16.0.10417.20228','channel':'2019 Volume'}
];

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