Security Updates for Microsoft Office Products (June 2026)

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

include('compat.inc');

if (description)
{
  script_id(320196);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/10");

  script_cve_id(
    "CVE-2026-44819",
    "CVE-2026-44821",
    "CVE-2026-44824",
    "CVE-2026-45461",
    "CVE-2026-45463",
    "CVE-2026-45472",
    "CVE-2026-45474",
    "CVE-2026-45475",
    "CVE-2026-45485",
    "CVE-2026-45645"
  );
  script_xref(name:"MSKB", value:"5002878");
  script_xref(name:"MSKB", value:"5002852");
  script_xref(name:"MSFT", value:"MS26-5002878");
  script_xref(name:"MSFT", value:"MS26-5002852");

  script_name(english:"Security Updates for Microsoft Office Products (June 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:

  - Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code
    locally. (CVE-2026-44819, CVE-2026-44824, CVE-2026-45461, CVE-2026-45463, CVE-2026-45472,
    CVE-2026-45474, CVE-2026-45475, CVE-2026-45645)

  - Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information
    locally. (CVE-2026-44821, CVE-2026-45485)

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/5002852");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/5002878");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following updates to address these issues:
  - KB5002878
  - KB5002852");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/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-2026-45645");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-45474");

  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:"2026/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/09");

  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 : 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 = 'MS26-06';
var kbs = ['5002878', '5002852'];
var severity = SECURITY_HOLE;

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

var constraints = [
  {'product' : 'Microsoft Office 2016', 'kb':'5002878', 'file':'mso.dll',              'fixed_version': '16.0.5556.1004'},
  {'product' : 'Microsoft Office 2016', 'kb':'5002852', 'file':'mso30win32client.dll', 'fixed_version': '16.0.5556.1001'}
];

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