Use After Free Vulnerability in Microsoft Word by Microsoft
CVE-2025-59222

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:
14 October 2025

What is CVE-2025-59222?

A vulnerability in Microsoft Word related to use after free can enable an unauthorized attacker to execute arbitrary code locally on a targeted system. This flaw poses a significant risk as it may allow malicious actors to manipulate applications in unexpected ways, leading to potential system compromise. Users are strongly encouraged to update their software and apply the latest security patches to mitigate the risk associated with this vulnerability.

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-2025-59222 : Use After Free Vulnerability in Microsoft Word by Microsoft