Use After Free Vulnerability in Microsoft Excel by Microsoft
CVE-2025-54896

7.8HIGH

Key Information:

Vendor

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

What is CVE-2025-54896?

A vulnerability in Microsoft Excel could allow an attacker to execute arbitrary code on the system running the application due to a use after free condition. Attackers exploiting this flaw could gain unauthorized access and control over the affected system, leading to potential data breaches or system compromise. Users are advised to apply patches and stay updated to mitigate this risk effectively.

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

.