Type Confusion Vulnerability in Microsoft Office Excel
CVE-2025-30375

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Office Online Server
Microsoft Office 2019
Microsoft 365 Apps For Enterprise
Microsoft Office Ltsc 2021
Vendor
CVE Published:
13 May 2025

What is CVE-2025-30375?

A type confusion vulnerability exists within Microsoft Office Excel that permits an unauthorized attacker to execute arbitrary code locally. This flaw results from improper validation of data types, allowing attackers to manipulate application behavior. Exploiting this vulnerability could facilitate the execution of malicious code, posing significant risks to affected systems. Users are urged to apply the latest security updates to mitigate this threat. For more detailed insights, consult the official vendor advisory.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5500.1000

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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CVE-2025-30375 : Type Confusion Vulnerability in Microsoft Office Excel