Security Updates for Microsoft Office Products (June 2026)

high Nessus Plugin ID 320196

Synopsis

The Microsoft Office Products are affected by multiple vulnerabilities.

Description

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.

Solution

Microsoft has released the following updates to address these issues:
- KB5002878
- KB5002852

See Also

https://support.microsoft.com/en-us/help/5002852

https://support.microsoft.com/en-us/help/5002878

Plugin Details

Severity: High

ID: 320196

File Name: smb_nt_ms26_jun_office.nasl

Version: 1.1

Type: Local

Agent: windows

Published: 6/9/2026

Updated: 6/9/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: High

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-45461

CVSS v3

Risk Factor: High

Base Score: 8.4

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/a:microsoft:office

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Patch Publication Date: 6/9/2026

Vulnerability Publication Date: 6/9/2026

Reference Information

CVE: 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

MSFT: MS26-5002852, MS26-5002878

MSKB: 5002852, 5002878