Security Updates for Microsoft Excel Products (August 2026)

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

include('compat.inc');

if (description)
{
  script_id(334614);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/11");

  script_cve_id(
    "CVE-2026-65807",
    "CVE-2026-68793",
    "CVE-2026-68794",
    "CVE-2026-68795",
    "CVE-2026-68796",
    "CVE-2026-68797",
    "CVE-2026-68799",
    "CVE-2026-68800",
    "CVE-2026-68801",
    "CVE-2026-68802",
    "CVE-2026-68803",
    "CVE-2026-68804",
    "CVE-2026-68805",
    "CVE-2026-68806",
    "CVE-2026-68807",
    "CVE-2026-68808",
    "CVE-2026-68810",
    "CVE-2026-68811",
    "CVE-2026-68812",
    "CVE-2026-68814",
    "CVE-2026-68815",
    "CVE-2026-68816",
    "CVE-2026-68817",
    "CVE-2026-70327",
    "CVE-2026-70328"
  );
  script_xref(name:"MSKB", value:"5002903");
  script_xref(name:"MSFT", value:"MS26-5002903");

  script_name(english:"Security Updates for Microsoft Excel Products (August 2026)");

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

  - Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an
    unauthorized attacker to execute code over a network. (CVE-2026-65807)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose
    information over a network. (CVE-2026-70327, CVE-2026-70328)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute
    code locally. (CVE-2026-68794, CVE-2026-68796, CVE-2026-68800, CVE-2026-68801, CVE-2026-68805,
    CVE-2026-68807, CVE-2026-68812, CVE-2026-68815)

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/5002903");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released KB5002903 to address this issue.");
  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:R/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-65807");

  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:excel");
  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 = 'MS26-08';
var kbs = ['5002903'];

var constraints = [
  { 'kb':'5002903', 'channel':'MSI', 'fixed_version': '16.0.5565.1001', 'sp' : 0}
];

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