Heap-based Buffer Overflow in Microsoft Excel by Microsoft
CVE-2025-62201

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:
11 November 2025

What is CVE-2025-62201?

A heap-based buffer overflow vulnerability exists in Microsoft Office Excel, which can be exploited by an unauthorized attacker to execute arbitrary code locally. The exploitation of this flaw can allow the attacker to manipulate data and potentially affect the integrity and availability of the system. Users are advised to apply necessary security updates as recommended to mitigate the risk associated with this vulnerability.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5526.1002

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-2025-62201 : Heap-based Buffer Overflow in Microsoft Excel by Microsoft