CVE-2026-55057
Analyzed
Analyzed - Analysis Complete
Integer Overflow in Microsoft Office Leads to Local Information Disclosure
Vulnerability report for CVE-2026-55057, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-07-14
Last updated on: 2026-07-16
Assigner: Microsoft Corporation
Description
Description
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | 365_apps | * |
| microsoft | 365_apps | * |
| microsoft | office_2019 | * |
| microsoft | office_2019 | * |
| microsoft | office_2016 | * |
| microsoft | office_2016 | * |
| microsoft | microsoft_365 | * |
| microsoft | office_2021 | * |
| microsoft | office_2021 | * |
| microsoft | office_2021 | * |
| microsoft | office_2024 | * |
| microsoft | office_2024 | * |
| microsoft | office_2024 | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-190 | The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. |
