CVE-2026-44818
Undergoing Analysis Undergoing Analysis - In Progress
Integer Underflow in Microsoft Office Excel Leads to Code Execution

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
CVE-2026-44818
EUVD
EUVD-2026-35661
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft office_excel *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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Executive Summary

This vulnerability is an integer underflow (also known as wrap or wraparound) in Microsoft Office Excel. It allows an unauthorized attacker to execute code locally on the affected system.

Impact Analysis

The vulnerability can lead to remote code execution, meaning an attacker could run malicious code on your system without your permission. This can compromise the confidentiality, integrity, and availability of your data and system.

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