---
id: CVE-2026-83774
title: >-
  Exposure of sensitive system information to an unauthorized control sphere in
  Windows Win32 Kernel Subsystem allows an authorized attacker to disclose
  information locally.
summary: >-
  Exposure of sensitive system information to an unauthorized control sphere in
  Windows Win32 Kernel Subsystem allows an authorized attacker to disclose
  information locally.
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-497
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:18:48.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83774'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83774'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:29.108Z'
---

## Overview

Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.