---
id: "CVE-2026-119387"
page: "https://infrastack.ai/live/CVE-2026-119387"
kind: "vulnerability"
aliases: ["CVE-2026-119387"]
title: "Windows QWAVE service use-after-free lets local users gain elevated privileges"
severity: "high"
cvss: 7.0
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": "vendor"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": ">= 10.0.26200.0, < 10.0.26200.9974", "ecosystem": "vendor"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": ">= 10.0.26100.0, < 10.0.26100.33822", "ecosystem": "vendor"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": ">= 10.0.20348.0, < 10.0.20348.5870", "ecosystem": "vendor"}, {"name": "Windows Server 2019", "fixed": ["10.0.17763.9487"], "affected": ">= 10.0.17763.0, < 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows Server 2016", "fixed": ["10.0.14393.9688"], "affected": ">= 10.0.14393.0, < 10.0.14393.9688", "ecosystem": "vendor"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": ">= 10.0.19045.0, < 10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": ">= 10.0.19044.0, < 10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": ">= 10.0.22631.0, < 10.0.22631.7711", "ecosystem": "vendor"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": ">= 10.0.28000.0, < 10.0.28000.3501", "ecosystem": "vendor"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": ">= 10.0.26300.0, < 10.0.26300.9974", "ecosystem": "vendor"}, {"name": "Windows 10 1809", "fixed": ["10.0.17763.9487"], "affected": ">= 10.0.17763.0, < 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 1607", "fixed": ["10.0.14393.9688"], "affected": ">= 10.0.14393.0, < 10.0.14393.9688", "ecosystem": "vendor"}]
ecosystems: []
tags: ["infrastructure", "local", "privilege-escalation", "qwave", "windows"]
not_affected_if: ["no-local-untrusted-users"]
published_at: "2026-11-10T19:19:52+00:00"
first_seen_at: "2026-11-10T19:24:56+00:00"
updated_at: "2026-11-10T22:56:38+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119387", "first_seen_at": "2026-11-10T19:24:56+00:00"}, {"source": "analyst", "url": "https://nvd.nist.gov/vuln/detail/cve-2026-119387", "first_seen_at": "2026-11-10T22:56:38+00:00", "cites": ["https://nvd.nist.gov/vuln/detail/cve-2026-119387"]}]
exploit_sources: []
---

# Windows QWAVE service use-after-free lets local users gain elevated privileges

Link for people: https://infrastack.ai/live/CVE-2026-119387 (this .md is for agents)

A use-after-free bug in the Windows Quality Windows Audio/Video Experience (QWAVE) service lets an authorized local attacker elevate privileges. An attacker who already has a low-privilege account on the machine can gain higher system rights.

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

## Affected

- vendor:Windows 11 24H2 affected >= 10.0.26100.0, < 10.0.26100.9974 fixed 10.0.26100.9974
- vendor:Windows 11 25H2 affected >= 10.0.26200.0, < 10.0.26200.9974 fixed 10.0.26200.9974
- vendor:Windows Server 2025 affected >= 10.0.26100.0, < 10.0.26100.33822 fixed 10.0.26100.33822
- vendor:Windows Server 2022 affected >= 10.0.20348.0, < 10.0.20348.5870 fixed 10.0.20348.5870
- vendor:Windows Server 2019 affected >= 10.0.17763.0, < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows Server 2016 affected >= 10.0.14393.0, < 10.0.14393.9688 fixed 10.0.14393.9688
- vendor:Windows 10 22H2 affected >= 10.0.19045.0, < 10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 10 21H2 affected >= 10.0.19044.0, < 10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 11 23H2 affected >= 10.0.22631.0, < 10.0.22631.7711 fixed 10.0.22631.7711
- vendor:Windows 11 26H1 affected >= 10.0.28000.0, < 10.0.28000.3501 fixed 10.0.28000.3501
- vendor:Windows 11 26H2 affected >= 10.0.26300.0, < 10.0.26300.9974 fixed 10.0.26300.9974
- vendor:Windows 10 1809 affected >= 10.0.17763.0, < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 1607 affected >= 10.0.14393.0, < 10.0.14393.9688 fixed 10.0.14393.9688

## How to check

Run 'winver' or PowerShell '[System.Environment]::OSVersion.Version' (or 'cmd /c ver') and compare the full build.revision with the fixed build for your Windows version. Lower means exposed. Whether the QWAVE service (Get-Service QWAVE) runs by default is not stated by the sources.

## Fix

Install the November 2026 Windows cumulative update that brings your build to at least the fixed build: Win10 1607/Server 2016 10.0.14393.9688; 1809/Server 2019 10.0.17763.9487; Win10 21H2 10.0.19044.7846; 22H2 10.0.19045.7846; Win11 23H2 10.0.22631.7711; Win11 24H2 10.0.26100.9974; 25H2 10.0.26200.9974; 26H1 10.0.28000.3501; 26H2 10.0.26300.9974; Server 2022 10.0.20348.5870; Server 2025 10.0.26100.33822. KB numbers: see the MSRC page.

## Timeline

- 2026-11-10T19:24:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119387
- 2026-11-10T22:56:38+00:00 analyst https://nvd.nist.gov/vuln/detail/cve-2026-119387 — Affected builds and fixed build numbers from Microsoft CNA data as shown on NVD; MSRC page not readable (empty), so nothing verified. KB numbers unknown. A forum post links KB5101650 to QWAVE but is unvetted, not used. No exploitation or PoC found.

## Documents

- [describes] NVD CVE-2026-119387 (Microsoft CNA affected builds) https://nvd.nist.gov/vuln/detail/cve-2026-119387

## From the sources

Use after free in Quality Windows Audio/Video Experience (QWAVE) service allows an authorized attacker to elevate privileges locally.

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