Use After Free Vulnerability in Microsoft Office Excel
CVE-2025-62553

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Office 2019
Microsoft 365 Apps For Enterprise
Microsoft Office Ltsc For Mac 2021
Microsoft Office Ltsc 2021
Vendor
CVE Published:
9 December 2025

What is CVE-2025-62553?

A use after free vulnerability in Microsoft Office Excel enables an unauthorized attacker to execute arbitrary code on the user's machine. This occurs when the application fails to properly manage memory, allowing malicious actors to exploit this weakness to gain control over affected systems. Users and organizations relying on Microsoft Office Excel should be aware of this vulnerability to mitigate potential risks.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5530.1000

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

JSON
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CVE-2025-62553 : Use After Free Vulnerability in Microsoft Office Excel