# CVE-2025-53732: Microsoft Office heap overflow in Android and Universal versions

Source: https://junglewise.ai/threats/cve-2025-53732-microsoft-office-heap-overflow-in-android-and-universal-versions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-08-12. Updated: 2026-05-22  
License: CC BY 4.0 with a link back

CVE-2025-53732 · Severity: high · CVSS 7.8 · Published 2025-08-12

A security vulnerability in Microsoft Office could allow an attacker to execute malicious code on a user's device. This issue occurs when the application incorrectly handles data in its memory, typically triggered if a user is tricked into opening a specially crafted file. Successful exploitation could lead to a full compromise of the application's data and potentially the underlying device.

Technologies: [Microsoft 365 Copilot](https://junglewise.ai/threats/technologies/365-copilot), [Microsoft Office](https://junglewise.ai/threats/technologies/office). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2025-53732 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-53732 being exploited in the wild.

**How severe is CVE-2025-53732?** High severity, with a CVSS score of 7.8, published 12 August 2025.

**Which products and versions are affected?** Microsoft 365 Copilot Android versions prior to 16.0.19127.20000; Microsoft Office Android versions prior to 16.0.19127.20000, Universal versions prior to 16.0.14326.22618.

**Is there a fix for CVE-2025-53732?** 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-2025-53732 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2025-53732?** 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 heap-based buffer overflow (CWE-122) exists in Microsoft Office due to improper bounds checking during memory operations (CWE-787). The vulnerability is exploitable locally but requires user interaction, such as opening a malicious document. An attacker who successfully exploits this vulnerability could gain the ability to execute arbitrary code in the context of the current user. The flaw affects Microsoft Office and 365 Copilot on Android and Universal platforms, with patches available in versions 16.0.19127.20000 and 16.0.14326.22618 respectively.

## Affected products

- Microsoft Office Android versions prior to 16.0.19127.20000, Universal versions prior to 16.0.14326.22618
- Microsoft 365 Copilot Android versions prior to 16.0.19127.20000

## Timeline

- 2025-08-12: disclosed
- 2025-08-12: advisory: Microsoft published the security update guide.

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53732](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53732)

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