Use After Free Vulnerability in Microsoft Office Excel
CVE-2025-62203

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Office Online Server
Microsoft Office 2019
Microsoft 365 Apps For Enterprise
Microsoft Office Ltsc 2021
Vendor
CVE Published:
11 November 2025

What is CVE-2025-62203?

The vulnerability identified in Microsoft Office Excel involves a use after free condition that could enable an unauthorized attacker to execute arbitrary code on the affected system. By exploiting this flaw, the attacker may gain the ability to manipulate the application in unintended ways, potentially compromising user data and system integrity. It is crucial for users to apply available security updates to mitigate these risks effectively.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5526.1002

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

JSON
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CVE-2025-62203 : Use After Free Vulnerability in Microsoft Office Excel