CVE-2026-44823
Analyzed
Analyzed - Analysis Complete
Integer Underflow in Microsoft Office Excel Leads to Code Execution
Vulnerability report for CVE-2026-44823, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-06-09
Last updated on: 2026-06-19
Assigner: Microsoft Corporation
Description
Description
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
| CWE-197 | Truncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion. |
