Out-of-Bounds Read Vulnerability in Microsoft Office Excel
CVE-2025-62564

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 December 2025

What is CVE-2025-62564?

An out-of-bounds read vulnerability in Microsoft Office Excel can enable unauthorized attackers to execute arbitrary code on affected systems. This vulnerability may arise due to improper handling of certain inputs, potentially leading to sensitive data exposure or system compromise. Users are advised to apply security updates and follow best practices to mitigate risk.

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

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