---
id: "CVE-2026-119960"
page: "https://infrastack.ai/live/CVE-2026-119960"
kind: "vulnerability"
aliases: ["CVE-2026-119960"]
title: "Windows Hyper-V: uninitialized memory lets a local user gain higher privileges"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": ">= 10.0.26100.0, < 10.0.26100.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": ">= 10.0.26200.0, < 10.0.26200.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": ">= 10.0.28000.0, < 10.0.28000.3501", "ecosystem": "microsoft"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": ">= 10.0.26300.0, < 10.0.26300.9974", "ecosystem": "microsoft"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": ">= 10.0.26100.0, < 10.0.26100.33822", "ecosystem": "microsoft"}]
ecosystems: []
tags: ["hyper-v", "infrastructure", "local", "privilege-escalation", "windows", "windows-11", "windows-server-2025"]
not_affected_if: ["hyper-v-not-enabled"]
published_at: "2026-11-10T19:20:20+00:00"
first_seen_at: "2026-11-10T19:25:05+00:00"
updated_at: "2026-11-10T22:15:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119960", "first_seen_at": "2026-11-10T19:25:05+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-119960", "first_seen_at": "2026-11-10T22:15:34+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-119960"]}]
exploit_sources: []
---

# Windows Hyper-V: uninitialized memory lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-119960 (this .md is for agents)

Windows Hyper-V has a flaw where it uses a resource before initializing it, letting an authorized local user elevate privileges. An attacker who already has a local account can gain higher system rights.

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

## Affected

- microsoft:Windows 11 24H2 affected >= 10.0.26100.0, < 10.0.26100.9974 fixed 10.0.26100.9974
- microsoft:Windows 11 25H2 affected >= 10.0.26200.0, < 10.0.26200.9974 fixed 10.0.26200.9974
- microsoft:Windows 11 26H1 affected >= 10.0.28000.0, < 10.0.28000.3501 fixed 10.0.28000.3501
- microsoft:Windows 11 26H2 affected >= 10.0.26300.0, < 10.0.26300.9974 fixed 10.0.26300.9974
- microsoft:Windows Server 2025 affected >= 10.0.26100.0, < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

Run winver or [System.Environment]::OSVersion / (Get-ComputerInfo).OsBuildNumber on Windows 11 24H2/25H2/26H1/26H2 and Windows Server 2025 hosts and compare the full build against the fixed builds. Only matters if Hyper-V is enabled: Get-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V

## Fix

Install the November 2026 Windows cumulative update: Windows 11 24H2 10.0.26100.9974, 25H2 10.0.26200.9974, 26H1 10.0.28000.3501, 26H2 10.0.26300.9974, Windows Server 2025 10.0.26100.33822 (per CNA record; KB numbers not confirmed).

## Timeline

- 2026-11-10T19:25:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119960
- 2026-11-10T22:15:34+00:00 analyst https://app.opencve.io/cve/CVE-2026-119960 — MSRC page is JS-only and returned no text; versions come from OpenCVE mirror of Microsoft's CNA record (not primary), so nothing marked verified. Not exploited per CVE record (E:U); no PoC found. Confirm the KB number on the MSRC guide.

## Documents

- [describes] OpenCVE CVE-2026-119960 (mirrors Microsoft CNA record) https://app.opencve.io/cve/CVE-2026-119960

## From the sources

Use of uninitialized resource in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_