---
id: "CVE-2026-119892"
page: "https://infrastack.ai/live/CVE-2026-119892"
kind: "vulnerability"
aliases: ["CVE-2026-119892"]
title: "Windows Installer: authorization flaw lets a local user gain higher privileges"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 Version 1607", "fixed": ["10.0.14393.9688"], "affected": ">=10.0.14393.0, <10.0.14393.9688", "ecosystem": "vendor"}, {"name": "Windows 10 Version 1809", "fixed": ["10.0.17763.9487"], "affected": ">=10.0.17763.0, <10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 Version 21H2", "fixed": ["10.0.19044.7846"], "affected": ">=10.0.19044.0, <10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 10 Version 22H2", "fixed": ["10.0.19045.7846"], "affected": ">=10.0.19045.0, <10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 11 Version 23H2", "fixed": ["10.0.22631.7711"], "affected": ">=10.0.22631.0, <10.0.22631.7711", "ecosystem": "vendor"}]
ecosystems: []
tags: ["infrastructure", "local", "privilege-escalation", "windows", "windows-installer"]
not_affected_if: ["unknown"]
published_at: "2026-11-10T19:20:09+00:00"
first_seen_at: "2026-11-10T19:25:01+00:00"
updated_at: "2026-11-10T22:27:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119892", "first_seen_at": "2026-11-10T19:25:01+00:00"}, {"source": "analyst", "url": "https://radar.offseq.com/threat/cve-2026-119892-cwe-863-incorrect-authorization-in-microsoft-windows-10-version-1607-686e33a05dd111d1", "first_seen_at": "2026-11-10T22:27:35+00:00", "cites": ["https://radar.offseq.com/threat/cve-2026-119892-cwe-863-incorrect-authorization-in-microsoft-windows-10-version-1607-686e33a05dd111d1", "https://www.rapid7.com/db/vulnerabilities/cve-2026-119892/"]}]
exploit_sources: []
---

# Windows Installer: authorization flaw lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-119892 (this .md is for agents)

Windows Installer has an incorrect authorization check that lets an attacker who already has a local account raise their privileges. The sources give no further detail on the exact trigger.

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

## Affected

- vendor:Windows 10 Version 1607 affected >=10.0.14393.0, <10.0.14393.9688 fixed 10.0.14393.9688
- vendor:Windows 10 Version 1809 affected >=10.0.17763.0, <10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 Version 21H2 affected >=10.0.19044.0, <10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 10 Version 22H2 affected >=10.0.19045.0, <10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 11 Version 23H2 affected >=10.0.22631.0, <10.0.22631.7711 fixed 10.0.22631.7711

## How to check

Get the full build number with winver or (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion').UBR; if it is below the fixed build for your Windows version, you are exposed. Also check other versions (Server 2016/2019, more Windows 11 releases) against the MSRC entry.

## Fix

Install the November 2026 cumulative update; fixed builds per the Microsoft CVE record (as mirrored): Win10 1607 10.0.14393.9688, 1809 10.0.17763.9487, 21H2 10.0.19044.7846, 22H2 10.0.19045.7846, Win11 23H2 10.0.22631.7711. Other versions: check the MSRC entry.

## Timeline

- 2026-11-10T19:25:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119892
- 2026-11-10T22:27:35+00:00 analyst https://radar.offseq.com/threat/cve-2026-119892-cwe-863-incorrect-authorization-in-microsoft-windows-10-version-1607-686e33a05dd111d1 — Microsoft MSRC page is JS-only and unreadable here; builds/fixes taken from OffSeq mirror of the Microsoft CNA record (Nov 2026 Patch Tuesday). Nothing verified. No exploitation or PoC reported (not in KEV). Only 6 of ~11 product rows were visible.

## Documents

- [describes] OffSeq: CVE-2026-119892 (mirrors Microsoft CVE record) https://radar.offseq.com/threat/cve-2026-119892-cwe-863-incorrect-authorization-in-microsoft-windows-10-version-1607-686e33a05dd111d1
- [mentions] Rapid7 DB: CVE-2026-119892 https://www.rapid7.com/db/vulnerabilities/cve-2026-119892/

## From the sources

Incorrect authorization in Windows Installer 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_