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.

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

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