Information Disclosure Vulnerability in Microsoft Office Excel
CVE-2026-32188

7.1HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Excel 2016
Microsoft Office 2019
Microsoft Office Ltsc 2021
Vendor
CVE Published:
14 April 2026

What is CVE-2026-32188?

An information disclosure vulnerability in Microsoft Office Excel enables unauthorized attackers to exploit out-of-bounds read conditions, potentially leading to localized data leaks. Attackers can leverage this flaw to gain access to sensitive information contained in Excel files, posing a significant threat to data privacy and organizational security. It is essential for users to apply the latest patches and updates provided by Microsoft to mitigate associated risks.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5548.1000

Microsoft Office 2019 32-bit Systems 19.0.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.