CVE-2025-49702: Microsoft Office type confusion local code execution

CVE-2025-49702 · Severity: high · CVSS 7.8 · Published 2025-07-08

Microsoft Office is a widely used suite of productivity applications including Word, Excel, and PowerPoint. A security flaw has been identified that could allow an attacker to run malicious code on a user's computer if the user is tricked into opening a specially crafted file. This could lead to a full system compromise, unauthorized data access, or the installation of malware.

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-2025-49702 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-49702 being exploited in the wild.
How severe is CVE-2025-49702?
High severity, with a CVSS score of 7.8, published 8 July 2025.
Which products and versions are affected?
Microsoft 365 Apps for Enterprise x86, x64; Microsoft Office 2016 x86, x64; Microsoft Office 2019 x86, x64; Microsoft Office LTSC 2021 x86, x64, macOS; and 1 more.
Is there a fix for CVE-2025-49702?
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-2025-49702 attacked?
It is attacked with local access, in a network appliance.
Am I affected by CVE-2025-49702?
Check whether you run Microsoft 365 Apps for Enterprise, Microsoft 365 Copilot for Android, Microsoft Office 2016 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

A type confusion vulnerability (CWE-843) exists in Microsoft Office across multiple platforms including Windows, macOS, and Android. The flaw occurs when the application accesses a resource using an incompatible type, which can be triggered by a local attacker. Exploitation requires user interaction, typically involving a victim opening a malicious file. Successful exploitation allows for arbitrary code execution in the context of the current user. Affected versions include Office 2016, 2019, LTSC 2021, LTSC 2024, and Microsoft 365 Apps.

Affected products

  • Microsoft Office 2016 x86, x64
  • Microsoft Office 2019 x86, x64
  • Microsoft Office LTSC 2021 x86, x64, macOS
  • Microsoft Office LTSC 2024 x86, x64, macOS
  • Microsoft 365 Apps for Enterprise x86, x64
  • Microsoft Office for Android
  • Microsoft 365 Copilot for Android

Timeline

  • 2025-07-08: advisory: Initial disclosure by Microsoft and NVD.

References

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