CVE-2026-88249
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Use After Free in Windows Client for NFS
Vulnerability report for CVE-2026-88249, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-10
Last updated on: 2026-11-10
Assigner: Microsoft Corporation
Description
Description
Use after free in Windows Client for NFS allows an unauthorized attacker to execute code over a network.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | From 10.0.14393.0 (inc) to 10.0.14393.9688 (exc) |
| Microsoft | Windows 10 Version 1809 | From 10.0.17763.0 (inc) to 10.0.17763.9487 (exc) |
| Microsoft | Windows 10 Version 21H2 | From 10.0.19044.0 (inc) to 10.0.19044.7846 (exc) |
| Microsoft | Windows 10 Version 22H2 | From 10.0.19045.0 (inc) to 10.0.19045.7846 (exc) |
| Microsoft | Windows 11 version 23H2 | From 10.0.22631.0 (inc) to 10.0.22631.7711 (exc) |
| Microsoft | Windows 11 Version 23H2 | From 10.0.22631.0 (inc) to 10.0.22631.7711 (exc) |
| Microsoft | Windows 11 Version 24H2 | From 10.0.26100.0 (inc) to 10.0.26100.9974 (exc) |
| Microsoft | Windows 11 Version 25H2 | From 10.0.26200.0 (inc) to 10.0.26200.9974 (exc) |
| Microsoft | Windows 11 version 26H1 | From 10.0.28000.0 (inc) to 10.0.28000.3501 (exc) |
| Microsoft | Windows 11 Version 26H2 | From 10.0.26300.0 (inc) to 10.0.26300.9974 (exc) |
| Microsoft | Windows Server 2016 | From 10.0.14393.0 (inc) to 10.0.14393.9688 (exc) |
| Microsoft | Windows Server 2016 (Server Core installation) | From 10.0.14393.0 (inc) to 10.0.14393.9688 (exc) |
| Microsoft | Windows Server 2019 | From 10.0.17763.0 (inc) to 10.0.17763.9487 (exc) |
| Microsoft | Windows Server 2019 (Server Core installation) | From 10.0.17763.0 (inc) to 10.0.17763.9487 (exc) |
| Microsoft | Windows Server 2022 | From 10.0.20348.0 (inc) to 10.0.20348.5870 (exc) |
| Microsoft | Windows Server 2025 | From 10.0.26100.0 (inc) to 10.0.26100.33822 (exc) |
| Microsoft | Windows Server 2025 (Server Core installation) | From 10.0.26100.0 (inc) to 10.0.26100.33822 (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. |
