# CVE-2025-62554: Microsoft Office type confusion local code execution

Source: https://junglewise.ai/threats/cve-2025-62554-microsoft-office-type-confusion-local-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-09. Updated: 2026-05-22  
License: CC BY 4.0 with a link back

CVE-2025-62554 · Severity: high · CVSS 8.4 · Published 2025-12-09

A vulnerability in Microsoft Office could allow an attacker to run unauthorized commands on a user's computer. Microsoft Office is a widely used suite of productivity applications including Word, Excel, and PowerPoint. If exploited, this flaw could allow an attacker to gain full control over the affected system, potentially leading to data theft or the installation of malicious software.

Technologies: [Microsoft 365 Apps for Enterprise](https://junglewise.ai/threats/technologies/365-apps-for-enterprise), [Microsoft Office 2016](https://junglewise.ai/threats/technologies/office-2016), [Microsoft Office 2019](https://junglewise.ai/threats/technologies/office-2019), [Microsoft Office for Android](https://junglewise.ai/threats/technologies/office-for-android), [Microsoft Office LTSC 2021](https://junglewise.ai/threats/technologies/office-ltsc-2021), [Microsoft Office LTSC 2024](https://junglewise.ai/threats/technologies/office-ltsc-2024). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2025-62554 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-62554 being exploited in the wild.

**How severe is CVE-2025-62554?** High severity, with a CVSS score of 8.4, published 9 December 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 for Android All versions; and 2 more.

**Is there a fix for CVE-2025-62554?** 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-2025-62554 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2025-62554?** 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

A type confusion vulnerability (CWE-843) exists in Microsoft Office due to the application accessing resources using an incompatible type. The vulnerability can be exploited locally by an unauthorized attacker to execute arbitrary code with the privileges of the current user. While the attack vector is local, the Microsoft CVSS assessment indicates that no prior administrative privileges or user interaction are required for successful exploitation. Affected versions include various editions of Office 2016, 2019, LTSC 2021, LTSC 2024, Microsoft 365 Apps, and Office for Android. Users are advised to apply the security updates provided by Microsoft.

## Affected products

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

## Timeline

- 2025-12-09: disclosed: Initial disclosure by Microsoft
- 2025-12-09: advisory: NVD entry created

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62554](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62554)

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- [Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.](https://junglewise.ai/threats/cve-2026-70310-out-of-bounds-read-in-microsoft-office-word-allows-an)
- [Microsoft Office out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-56195-microsoft-office-out-of-bounds-read-information-disclosure)
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