CVE-2026-108438: Microsoft Office Word Information Disclosure Vulnerability

Published Oct 15, 2026
·
Updated

Microsoft Office Word Information Disclosure Vulnerability

Other sources

Use after free in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

— Microsoft

Affected Software

5 affected componentsFixes available
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC for Mac 2021<16.114.26101123
16.114.26101123
Microsoft Office LTSC for Mac 2024<16.114.26101123
16.114.26101123
Microsoft 365 Apps for Enterprise<https://aka.ms/OfficeSecurityReleases
https://aka.ms/OfficeSecurityReleases
Microsoft Office 365 for Mac<16.114.26101123
16.114.26101123

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in https://aka.ms/OfficeSecurityReleases
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 16.114.26101123

Event History

Oct 15, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·08:57 PM
Data Sourced
via MITRE·08:57 PM
DescriptionSeverity

Frequently Asked Questions

1

What must an attacker do to exploit this issue?

The attack vector is network-based and requires user interaction. No attacker privileges are required, but the available data does not specify the exact user action or delivery mechanism.

2

Which products are identified as affected?

The affected software listed is Microsoft 365 Apps for Enterprise, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, and Microsoft Office 365 for Mac.

3

What is the likely security impact?

Successful exploitation can disclose information. The provided metrics indicate high confidentiality impact, with no indicated integrity or availability impact.

Contact

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