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OpenAdvisories
High MSRC-CVE-2025-54905 1 CVE

Microsoft Word Information Disclosure Vulnerability

Published Sep 9, 2025 · Updated Sep 16, 2025 · Revision 2

Vendor: Microsoft

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Is the Preview Pane an attack vector for this vulnerability?
Yes, the Preview Pane is an attack vector.

Are the updates for Microsoft Office LTSC for Mac 2021 and 2024 currently available?
Yes. As of September 15, 2025, the security update for Microsoft Office LTSC for Mac 2021 and 2024 are available. Customers running Microsoft Office LTSC for Mac 2021 and 2024 should ensure the update is installed to be protected from this vulnerability.

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
An attacker must send a user a malicious Office file and convince them to open it.

What type of information could be disclosed by this vulnerability?
An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.

There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?
Yes. Customers should apply all updates offered for the software installed on their systems. If multiple updates apply, they can be installed in any order.

Security updates
16.0.5517.1000 — https://support.microsoft.com/help/5002778
16.0.5517.1000 — https://support.microsoft.com/help/5002777
16.0.10417.20047 — https://support.microsoft.com/help/5002775
16.0.10417.20047 — https://support.microsoft.com/help/5002774
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.101.25091314 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.5517.1000 — https://support.microsoft.com/help/5002780

Vulnerabilities 1

Revision history

  1. #2

    Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any action. See the [Release Notes](https://go.microsoft.com/fwlink/p/?linkid=831049) for more information and download links.

  2. #1

    Information published.

References