CVE-2026-20955
Unknown Unknown - Not Provided
Untrusted Pointer Dereference in Excel Enables Local Code Execution

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
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Meta Information
Published
2026-01-13
Last Modified
2026-01-13
Generated
2026-05-07
AI Q&A
2026-01-14
EPSS Evaluated
2026-05-05
NVD
CVE-2026-20955
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft office_excel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-822 The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :

An attacker exploiting this vulnerability can execute arbitrary code on your system with potentially high impact, including full control over confidentiality, integrity, and availability of your data and system. [1]


Can you explain this vulnerability to me?

This vulnerability is an untrusted pointer dereference in Microsoft Office Excel that allows an unauthorized attacker to execute code locally on the affected system. [1]


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