---
id: "CVE-2026-88249"
page: "https://infrastack.ai/live/CVE-2026-88249"
kind: "vulnerability"
aliases: ["CVE-2026-88249"]
title: "Windows Client for NFS: use-after-free lets a network attacker run code"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows Client for NFS", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["infrastructure", "nfs", "self-hosted", "windows"]
not_affected_if: []
published_at: "2026-11-10T19:21:34+00:00"
first_seen_at: "2026-11-10T19:25:21+00:00"
updated_at: "2026-11-10T20:39:07+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88249", "first_seen_at": "2026-11-10T19:25:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-10T20:39:07+00:00"}]
exploit_sources: []
---

# Windows Client for NFS: use-after-free lets a network attacker run code

Link for people: https://infrastack.ai/live/CVE-2026-88249 (this .md is for agents)

Windows Client for NFS has a use-after-free memory bug that lets an unauthorized attacker over the network execute code. The sources give a CVSS score of 8.8 and do not describe the affected versions or fix.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Windows Client for NFS affected range not listed fixed no fixed version listed

## How to check

Unknown until the Microsoft advisory is read. Meanwhile, check whether the optional Windows feature Client for NFS is installed (PowerShell: Get-WindowsOptionalFeature -Online -FeatureName ServicesForNFS-ClientOnly), and compare installed updates to the November 2026 cumulative update.

## Timeline

- 2026-11-10T19:25:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-88249
- 2026-11-10T20:39:07+00:00 analyst — MSRC page is JS-only and browser-cli is out of quota; could not read the Microsoft advisory. Only a third-party list (NextGuard) confirms the title, CVSS 8.8 and a Nov 9 2026 date. Affected builds, KB and whether Client for NFS must be enabled remain unknown. Settle by reading the MSRC page for CVE-2026-88249.

## From the sources

Use after free in Windows Client for NFS allows an unauthorized attacker to execute code over a network.

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