CVE-2026-83862
Modified
Modified - Updated After Analysis
Use After Free in Windows Network Load Balancing
Vulnerability report for CVE-2026-83862, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-13
Last updated on: 2026-10-23
Assigner: Microsoft Corporation
Description
Description
Use after free in Windows Network Load Balancing allows an unauthorized attacker to execute code over an adjacent network.
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_server_2022 | to 10.0.20348.5761 (exc) |
| microsoft | windows_10_1607 | to 10.0.14393.9612 (exc) |
| microsoft | windows_10_1607 | to 10.0.14393.9612 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.9376 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.9376 (exc) |
| microsoft | windows_server_2016 | to 10.0.14393.9612 (exc) |
| microsoft | windows_server_2019 | to 10.0.17763.9376 (exc) |
| microsoft | windows_server_2025 | to 10.0.26100.33650 (exc) |
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
