CVE-2025-53733

Published: Aug 12, 2025Modified: Jun 17, 2026

8.4

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.5 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Incorrect conversion between numeric types in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Affected (14)

Products: Microsoft: 365 Apps, Office, Office Long Term Servicing Channel, Sharepoint Enterprise Server, Sharepoint Server, Word

6 products

Office Long Term Servicing Channel

Sharepoint Enterprise Server

Sharepoint Server

Configuration A

14 vulnerable

Vulnerable Software	Affected Versions
Microsoft 365 Apps	All versions
Microsoft 365 Apps	All versions
Microsoft Office	Version 2019
Microsoft Office	Version 2019
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2024
Microsoft Office Long Term Servicing Channel	Version 2024
Microsoft Office Long Term Servicing Channel	Version 2024
Microsoft Sharepoint Enterprise Server	Version 2016
Microsoft Sharepoint Server	Version 2019
Microsoft Word	Version 2016
Microsoft Word	Version 2016

Related CWEs

Incorrect Conversion between Numeric Types

When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53733

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.