CVE-2026-55055
Analyzed
Analyzed - Analysis Complete
Microsoft Office Word Stack-Based Buffer Overflow
Vulnerability report for CVE-2026-55055, 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
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | sharepoint_server | 2019 |
| microsoft | sharepoint_server | 2016 |
| microsoft | 365_apps | * |
| microsoft | 365_apps | * |
| microsoft | word | 2016 |
| microsoft | word | 2016 |
| microsoft | office_2019 | * |
| microsoft | office_2019 | * |
| microsoft | microsoft_365 | * |
| microsoft | office_2021 | * |
| microsoft | office_2021 | * |
| microsoft | office_2021 | * |
| microsoft | office_2024 | * |
| microsoft | office_2024 | * |
| microsoft | office_2024 | * |
| microsoft | sharepoint_server | to 16.0.19725.20434 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
