CVE-2026-20950
Unknown
Unknown - Not Provided
Use-After-Free in Microsoft Excel Enables Local Code Execution
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
Description
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | office_excel | * |
Helpful Resources
Exploitability
CWE
KEV
| 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 that allows an unauthorized attacker to execute code locally on the affected system.
How can this vulnerability impact me? :
An attacker could exploit this vulnerability to run malicious code on your system with the privileges of the user running Excel, potentially leading to data loss, system compromise, or further attacks.
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