Memory Management Flaw in Microsoft Office Excel
CVE-2025-54899

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 September 2025

What is CVE-2025-54899?

A vulnerability exists in Microsoft Office Excel, where improper memory management can lead to unauthorized code execution. This flaw potentially enables attackers to execute arbitrary code on the system when a user opens a specially crafted Excel file, putting sensitive data and system integrity at risk. It’s essential for users to apply necessary security updates to mitigate exposure.

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Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5517.1000

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

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