---
id: "CVE-2026-119862"
page: "https://infrastack.ai/live/CVE-2026-119862"
kind: "vulnerability"
aliases: ["CVE-2026-119862"]
title: "Windows Input System: out-of-bounds read lets local user gain higher privileges"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"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"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": ">=10.0.26100.0, <10.0.26100.9974", "ecosystem": "microsoft"}]
ecosystems: []
tags: ["infrastructure", "local-privilege-escalation", "windows", "windows-10", "windows-11"]
not_affected_if: ["patched-november-2026"]
published_at: "2026-11-10T19:20:04+00:00"
first_seen_at: "2026-11-10T19:25:00+00:00"
updated_at: "2026-11-10T22:45:52+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119862", "first_seen_at": "2026-11-10T19:25:00+00:00"}, {"source": "analyst", "url": "https://radar.offseq.com/threat/cve-2026-119862-cwe-125-out-of-bounds-read-in-microsoft-windows-10-version-1809-a2cd1ff2d4a6e9d0", "first_seen_at": "2026-11-10T22:45:52+00:00", "cites": ["https://radar.offseq.com/threat/cve-2026-119862-cwe-125-out-of-bounds-read-in-microsoft-windows-10-version-1809-a2cd1ff2d4a6e9d0"]}]
exploit_sources: []
---

# Windows Input System: out-of-bounds read lets local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-119862 (this .md is for agents)

A memory read past the end of a buffer in the Windows Input System lets an attacker who already has a local account raise their privileges. The sources do not say which Windows versions are affected or how the flaw is triggered.

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

## Affected

- 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
- microsoft:Windows 11 24H2 affected >=10.0.26100.0, <10.0.26100.9974 fixed 10.0.26100.9974

## How to check

Run winver or PowerShell [System.Environment]::OSVersion.Version / (Get-ComputerInfo).OsBuildNumber and compare the full build (e.g. 10.0.26100.x) with the fixed builds listed in the fix field.

## Fix

Install the November 2026 Windows cumulative update: Win10 1809 10.0.17763.9487, 21H2 10.0.19044.7846, 22H2 10.0.19045.7846, Win11 23H2 10.0.22631.7711, 24H2 10.0.26100.9974 (list shows 3 more builds not seen; confirm on the MSRC page).

## Timeline

- 2026-11-10T19:25:00+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119862
- 2026-11-10T22:45:52+00:00 analyst https://radar.offseq.com/threat/cve-2026-119862-cwe-125-out-of-bounds-read-in-microsoft-windows-10-version-1809-a2cd1ff2d4a6e9d0 — MSRC page unreadable via web-cli (empty); MSRC API only points to the 2026-Nov update. Builds/fixes from OffSeq mirror of the Microsoft CNA record; nothing verified. Not exploited, no PoC found (CVSS E:U).

## Documents

- [describes] OffSeq Threat Radar: CVE-2026-119862 https://radar.offseq.com/threat/cve-2026-119862-cwe-125-out-of-bounds-read-in-microsoft-windows-10-version-1809-a2cd1ff2d4a6e9d0

## From the sources

Out-of-bounds read in Windows Input System 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_