Is CVE-2025-59234 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-59234 being exploited in the wild.

How severe is CVE-2025-59234?

High severity, with a CVSS score of 7.8, published 14 October 2025.

Which products and versions are affected?

Microsoft 365 Copilot Android versions before 16.0.19328.20000; Microsoft Office 2016, 2019, LTSC 2021, LTSC 2024, 365 Apps, Android versions before 16.0.19328.20000.

Is there a fix for CVE-2025-59234?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2025-59234 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2025-59234?

Check whether you run Microsoft 365 Copilot or Microsoft Office at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-59234: Microsoft Office use after free local code execution

CVE-2025-59234 · Severity: high · CVSS 7.8 · Published 2025-10-14

A vulnerability in Microsoft Office could allow an attacker to run malicious code on a user's computer. This typically occurs if a user is tricked into opening a specially crafted file. Successful exploitation could lead to a full compromise of the user's documents, data, and system access.

Technologies: Microsoft 365 Copilot, Microsoft Office. Vendors: Microsoft.

Quick answers

Is CVE-2025-59234 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-59234 being exploited in the wild.
How severe is CVE-2025-59234?: High severity, with a CVSS score of 7.8, published 14 October 2025.
Which products and versions are affected?: Microsoft 365 Copilot Android versions before 16.0.19328.20000; Microsoft Office 2016, 2019, LTSC 2021, LTSC 2024, 365 Apps, Android versions before 16.0.19328.20000.
Is there a fix for CVE-2025-59234?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-59234 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2025-59234?: Check whether you run Microsoft 365 Copilot or Microsoft Office at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free (CWE-416) vulnerability exists in multiple versions of Microsoft Office, including desktop and mobile (Android) editions. The flaw is triggered when the application attempts to use memory that has already been freed, which can be leveraged by an attacker to execute arbitrary code. While the attack vector is local, it requires user interaction, such as opening a malicious document. The vulnerability affects Office 2016, 2019, LTSC 2021/2024, and Microsoft 365 Apps across Windows, macOS, and Android platforms. Microsoft has released security updates to address this issue.

Affected products

Microsoft Office 2016, 2019, LTSC 2021, LTSC 2024, 365 Apps, Android versions before 16.0.19328.20000
Microsoft 365 Copilot Android versions before 16.0.19328.20000

Timeline

2025-10-14: disclosed
2025-10-14: advisory

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59234

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.