Use After Free Vulnerability in Microsoft Office Word by Microsoft
CVE-2025-62559

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Office 2019
Microsoft 365 Apps For Enterprise
Vendor
CVE Published:
9 December 2025

What is CVE-2025-62559?

An exploitation scenario involving Microsoft Office Word presents a use after free vulnerability that could allow unauthorized attackers to execute arbitrary code on a user's system. This vulnerability can be triggered when the application improperly manages memory allocation, resulting in potential risks for affected users. It highlights the importance of applying timely security updates to mitigate unauthorized access and safeguard sensitive information.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 2019 32-bit Systems 19.0.0

Microsoft Office LTSC 2021 x64-based Systems 16.0.1

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-2025-62559 : Use After Free Vulnerability in Microsoft Office Word by Microsoft