---
id: "CVE-2026-96019"
page: "https://infrastack.ai/live/CVE-2026-96019"
kind: "vulnerability"
aliases: ["CVE-2026-96019"]
title: "Windows Installer: race condition lets a local user gain higher privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 1607", "fixed": ["10.0.14393.9688"], "affected": ">=10.0.14393.0, <10.0.14393.9688", "ecosystem": "microsoft"}, {"name": "Windows 10 1809", "fixed": ["10.0.17763.9487"], "affected": ">=10.0.17763.0, <10.0.17763.9487", "ecosystem": "microsoft"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": ">=10.0.19044.0, <10.0.19044.7846", "ecosystem": "microsoft"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": ">=10.0.19045.0, <10.0.19045.7846", "ecosystem": "microsoft"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": ">=10.0.22631.0, <10.0.22631.7711", "ecosystem": "microsoft"}]
ecosystems: []
tags: ["infrastructure", "windows", "windows-installer"]
not_affected_if: ["no-local-untrusted-users"]
published_at: "2026-11-10T19:21:58+00:00"
first_seen_at: "2026-11-10T19:25:27+00:00"
updated_at: "2026-11-10T20:10:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96019", "first_seen_at": "2026-11-10T19:25:27+00:00"}, {"source": "analyst", "url": "https://radar.offseq.com/threat/cve-2026-96019-cwe-362-race-condition-in-microsoft-windows-10-version-1607-1eb38a8bb1566ac8", "first_seen_at": "2026-11-10T20:10:26+00:00", "cites": ["https://radar.offseq.com/threat/cve-2026-96019-cwe-362-race-condition-in-microsoft-windows-10-version-1607-1eb38a8bb1566ac8"]}]
exploit_sources: []
---

# Windows Installer: race condition lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-96019 (this .md is for agents)

A race condition in Windows Installer lets an attacker who already has a local account run code with higher privileges. The sources give no more detail on the exact flaw.

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

## Affected

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

## How to check

Run winver (or [System.Environment]::OSVersion.Version in PowerShell) and compare the full build number with the fixed builds in the MSRC entry for CVE-2026-96019. A build below the fixed number is exposed. Only local, low-privileged accounts can exploit it.

## Fix

Install the November 2026 Windows cumulative update for your version. Per a CVE-record mirror (not Microsoft's page), fixed builds: Windows 10 1607 10.0.14393.9688; 1809 10.0.17763.9487; 21H2 10.0.19044.7846; 22H2 10.0.19045.7846; Windows 11 23H2 10.0.22631.7711. The mirror said 11 builds are fixed but listed only these 5 products, so check the MSRC entry for the rest.

## Timeline

- 2026-11-10T19:25:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-96019
- 2026-11-10T20:10:26+00:00 analyst https://radar.offseq.com/threat/cve-2026-96019-cwe-362-race-condition-in-microsoft-windows-10-version-1607-1eb38a8bb1566ac8 — MSRC page is JS-only and returned nothing, so no primary doc linked and nothing marked verified. Affected/fixed builds are from the OffSeq CVE-record mirror (CNA Microsoft, CVSS 7.0 AC:H PR:L, no exploitation or PoC known as of Nov 10). The mirror's '+8' suggests more builds than the 5 products listed; revisit against MSRC.

## Documents

- [describes] OffSeq Threat Radar: CVE-2026-96019 (mirror of CVE record data) https://radar.offseq.com/threat/cve-2026-96019-cwe-362-race-condition-in-microsoft-windows-10-version-1607-1eb38a8bb1566ac8

## From the sources

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Installer 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_