CVE-2026-32188
Out-of-Bounds Read in Microsoft Excel Causes Local Information Disclosure
Publication date: 2026-04-14
Last updated on: 2026-04-29
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | office_online_server | * |
| microsoft | 365_apps | * |
| microsoft | 365_apps | * |
| microsoft | excel | 2016 |
| microsoft | excel | 2016 |
| microsoft | office_long_term_servicing_channel | 2021 |
| microsoft | office | 2019 |
| microsoft | office | 2019 |
| microsoft | office_long_term_servicing_channel | 2024 |
| microsoft | office_long_term_servicing_channel | 2021 |
| microsoft | office_long_term_servicing_channel | 2021 |
| microsoft | office_long_term_servicing_channel | 2024 |
| microsoft | office_long_term_servicing_channel | 2024 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, ensure that your Microsoft Office Excel installation is updated with the latest security patches provided by Microsoft.
Since the vulnerability allows local information disclosure via an out-of-bounds read, limiting local access to untrusted Excel files and applying principle of least privilege can help reduce risk.
Can you explain this vulnerability to me?
This vulnerability is an out-of-bounds read issue in Microsoft Office Excel. It allows an unauthorized attacker to read memory outside the intended boundaries, which can lead to the disclosure of sensitive information on the local system.
How can this vulnerability impact me? :
The impact of this vulnerability is information disclosure. An attacker could exploit this flaw to access sensitive data stored in memory on the affected system without proper authorization.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
This vulnerability allows an unauthorized attacker to disclose information locally due to an out-of-bounds read in Microsoft Office Excel.
Such unauthorized information disclosure could potentially impact compliance with data protection regulations like GDPR and HIPAA, which require safeguarding sensitive information against unauthorized access.
However, no specific details are provided about the nature of the disclosed information or direct compliance implications.