Detections
Analytics

Security Updates for Microsoft Word Products (August 2026)

high Nessus Plugin ID 334624

Synopsis

The Microsoft Word Products are affected by multiple vulnerabilities.

Description

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.

Solution

Microsoft has released KB5002901 to address this issue.

See Also

https://support.microsoft.com/en-us/help/5002901

Plugin Details

Severity: High

ID: 334624

File Name: smb_nt_ms26_aug_word.nasl

Version: 1.1

Type: Local

Agent: windows

Published: 8/11/2026

Updated: 8/11/2026

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-2026-63527

CVSS v3

Risk Factor: High

Base Score: 7.8

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

Vulnerability Information

CPE: cpe:/a:microsoft:word

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Patch Publication Date: 8/11/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: 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

MSFT: MS26-5002901

MSKB: 5002901