Security Updates for Microsoft Word Products (August 2026)

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

include('compat.inc');

if (description)
{
  script_id(334624);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/11");

  script_cve_id(
    "CVE-2026-63521",
    "CVE-2026-63525",
    "CVE-2026-63527",
    "CVE-2026-63528",
    "CVE-2026-63530",
    "CVE-2026-63531",
    "CVE-2026-64905",
    "CVE-2026-64907",
    "CVE-2026-64915",
    "CVE-2026-64917",
    "CVE-2026-66806",
    "CVE-2026-66809",
    "CVE-2026-66810",
    "CVE-2026-70310",
    "CVE-2026-70311",
    "CVE-2026-70318"
  );
  script_xref(name:"MSKB", value:"5002901");
  script_xref(name:"MSFT", value:"MS26-5002901");

  script_name(english:"Security Updates for Microsoft Word Products (August 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:

  - Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute
    code locally. (CVE-2026-63527, CVE-2026-64907)

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
    (CVE-2026-70311)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose
    information locally. (CVE-2026-63521, CVE-2026-63528, CVE-2026-63530, CVE-2026-63531,
    CVE-2026-64917, CVE-2026-70310)

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/5002901");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released KB5002901 to address this issue.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-63527");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  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 = 'MS26-08';
var kbs = ['5002901'];

var constraints = [
  { 'kb':'5002901', 'channel':'MSI', 'fixed_version': '16.0.5565.1000', 'sp' : 0}
];

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