Type Confusion Vulnerability in Microsoft Office Excel
CVE-2025-53739

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Office Online Server
Microsoft Office 2019
Microsoft 365 Apps For Enterprise
Microsoft Office Ltsc For Mac 2021
Vendor
CVE Published:
12 August 2025

What is CVE-2025-53739?

A type confusion vulnerability exists in Microsoft Office Excel, which can be exploited by an unauthorized attacker to execute code locally. This vulnerability arises from improper handling of resource access, potentially leading to execution of malicious commands on affected systems. It is crucial for users to be aware of potential risks and implement necessary security updates to mitigate vulnerabilities associated with this issue. For detailed information, refer to the official vendor advisory.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5513.1000

Microsoft Office 2019 32-bit Systems 19.0.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-53739 : Type Confusion Vulnerability in Microsoft Office Excel