CVE-2025-49696: Microsoft Office out-of-bounds read and local code execution

CVE-2025-49696 · Severity: high · CVSS 8.4 · Published 2025-07-08

A vulnerability in Microsoft Office could allow an attacker to run unauthorized code on a user's computer. Microsoft Office is a widely used suite of productivity applications, and an exploit could lead to full system compromise, data theft, or the installation of malware. This issue affects various versions of Office across Windows, macOS, and Android platforms.

Technologies: Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019, Microsoft Office for Android, Microsoft Office LTSC 2021, Microsoft Office LTSC 2024. Vendors: Microsoft.

Quick answers

Is CVE-2025-49696 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-49696 being exploited in the wild.
How severe is CVE-2025-49696?
High severity, with a CVSS score of 8.4, published 8 July 2025.
Which products and versions are affected?
Microsoft 365 Apps for Enterprise x86 and x64 editions; Microsoft Office 2016 x86 and x64 editions; Microsoft Office 2019 x86 and x64 editions; Microsoft Office LTSC 2021 Windows and macOS editions; and 1 more.
Is there a fix for CVE-2025-49696?
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-2025-49696 attacked?
It is attacked with local access, in a network appliance.
Am I affected by CVE-2025-49696?
Check whether you run Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019 or one of the others listed 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

This vulnerability is characterized as an out-of-bounds read (CWE-125) and a heap-based buffer overflow (CWE-122) within Microsoft Office. The flaw allows an unauthorized attacker to achieve local code execution on the affected system. While the attack vector is local, the CVSS metric indicates no prior privileges (PR:N) or user interaction (UI:N) are required once the attacker has local access or a means to deliver the exploit. The vulnerability impacts a broad range of products including Office 2016, 2019, LTSC 2021/2024, and Microsoft 365 Apps. Microsoft has released security updates to address this issue.

Affected products

  • Microsoft Office 2016 x86 and x64 editions
  • Microsoft Office 2019 x86 and x64 editions
  • Microsoft Office LTSC 2021 Windows and macOS editions
  • Microsoft Office LTSC 2024 Windows and macOS editions
  • Microsoft 365 Apps for Enterprise x86 and x64 editions
  • Microsoft Office for Android

Timeline

  • 2025-07-08: disclosed: Initial disclosure by Microsoft Corporation
  • 2025-07-08: advisory: Microsoft Security Update Guide published

References

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