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OpenAdvisories
High MSRC-CVE-2026-45471 1 CVE

Microsoft Word Remote Code Execution Vulnerability

Published Jun 9, 2026 · Updated Jun 19, 2026 · Revision 2

Vendor: Microsoft

Summary

Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?
The word Remote in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the 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.

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.

Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.

Are the updates for Microsoft Office LTSC for Mac 2021 and 2024 currently available?
Yes. As of June 16, 2025, the security update for Microsoft Office LTSC for Mac 2021, 2024 and Microsoft Office 365 for Mac are available. Customers running Microsoft Office LTSC for Mac 2021, 2024 and Microsoft Office 365 for Mac should ensure the update is installed to be protected from this vulnerability.

Security updates
16.110.26061317 — https://www.microsoft.com/en-us/microsoft-365/mac/microsoft-365-for-mac?msockid=35f9adb0e74b61392038b90de6fe608c
16.0.5556.1005 — https://support.microsoft.com/help/5002880
16.0.5556.1002 — https://support.microsoft.com/help/5002881
16.0.10417.20153 — https://support.microsoft.com/help/5002874
16.0.10417.20153 — https://support.microsoft.com/help/5002876
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.110.26061317 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.19725.20384 — https://support.microsoft.com/help/5002873
16.0.5556.1000 — https://support.microsoft.com/help/5002879

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