---
id: CVE-2026-62798
title: Win32k Information Disclosure Vulnerability
summary: >-
  Untrusted pointer dereference in Windows Win32K allows an authorized attacker
  to disclose information locally.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-822
vendor: Microsoft
product: Windows 11 version 23H2
affected:
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704
  - windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296
  - >-
    windows_server_2025_server_core_installation >= 10.0.26100.0 <
    10.0.26100.33296
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-11T20:38:25.639085Z'
published: '2026-08-11'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:36:19.198Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62798'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62798'
    label: Win32k Information Disclosure Vulnerability
tags:
  - cve.org
epss: 0.00404
epssPercentile: 0.3184
ingestedAt: '2026-09-08T18:07:34.898Z'
---

## Overview

Untrusted pointer dereference in Windows Win32K allows an authorized attacker to disclose information locally.

## Affected

- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517`
- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517`
- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168`
- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168`
- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704`
- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296`
- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296`

## Remediation

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