Detections
Analytics

Security Updates for Microsoft Outlook Products (August 2026)

high Nessus Plugin ID 334615

Synopsis

The Microsoft Outlook Products are affected by multiple vulnerabilities.

Description

The Microsoft Outlook Products are missing a security update. They are, therefore, affected by multiple vulnerabilities:

 - Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network. (CVE-2026-70329)

 - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally. (CVE-2026-63518)

 - Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network. (CVE-2026-62882)

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 KB5002755 to address this issue.

See Also

https://support.microsoft.com/en-us/help/5002755

Plugin Details

Severity: High

ID: 334615

File Name: smb_nt_ms26_aug_outlook.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: Critical

Base Score: 10

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

CVSS Score Source: CVE-2026-70329

CVSS v3

Risk Factor: High

Base Score: 8.8

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

Vulnerability Information

CPE: cpe:/a:microsoft:outlook

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Patch Publication Date: 8/11/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2026-62882, CVE-2026-63518, CVE-2026-70329

MSFT: MS26-5002755

MSKB: 5002755