CVE-2026-56176
Analyzed
Analyzed - Analysis Complete
Out-of-Bounds Read in Windows Win32K - GRFX
Vulnerability report for CVE-2026-56176, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-07-14
Last updated on: 2026-07-22
Assigner: Microsoft Corporation
Description
Description
Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_server_2012 | r2 |
| microsoft | windows_server_2012 | * |
| microsoft | windows_10_1607 | to 10.0.14393.9339 (exc) |
| microsoft | windows_10_1607 | to 10.0.14393.9339 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.9020 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.9020 (exc) |
| microsoft | windows_server_2016 | to 10.0.14393.9339 (exc) |
| microsoft | windows_server_2019 | to 10.0.17763.9020 (exc) |
| microsoft | windows_server_2022 | to 10.0.20348.5386 (exc) |
| microsoft | windows_server_2025 | to 10.0.26100.33158 (exc) |
| microsoft | windows_10_21h2 | to 10.0.19044.7548 (exc) |
| microsoft | windows_10_22h2 | to 10.0.19045.7548 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.8875 (exc) |
| microsoft | windows_11_26h1 | to 10.0.28000.2525 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.8875 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
