CVE-2026-32189
Use-After-Free in Microsoft Excel Enables Local Code Execution
Publication date: 2026-04-14
Last updated on: 2026-04-29
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS 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-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a use after free issue in Microsoft Office Excel. It allows an unauthorized attacker to execute code locally on the affected system.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability can execute arbitrary code on your system with local access. This can lead to full compromise of confidentiality, integrity, and availability of your data and system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
This vulnerability allows an unauthorized attacker to execute code locally on a system running Microsoft Office Excel, which could lead to unauthorized access, data compromise, or data loss.
Such unauthorized access and potential data breaches can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of sensitive data and maintaining data integrity and confidentiality.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should apply the security updates provided by Microsoft for Microsoft Office Excel as soon as they become available.
Additionally, avoid opening untrusted Excel files and ensure that user privileges are minimized to reduce the impact of potential exploitation.