---
id: CVE-2025-62458
title: >-
  Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized
  attacker to elevate privileges locally.
summary: >-
  Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized
  attacker to elevate privileges locally.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: microsoft
product: windows_10_1607
affected:
  - windows_10_1607 < 10.0.14393.8688
  - windows_10_1809 < 10.0.17763.8146
  - windows_10_21h2 < 10.0.19044.6691
  - windows_10_22h2 < 10.0.19045.6691
  - windows_11_23h2 < 10.0.22631.6345
  - windows_server_2008 = r2
  - windows_server_2012
  - windows_server_2012 = r2
  - windows_server_2016 < 10.0.14393.8688
  - windows_server_2019 < 10.0.17763.8146
  - windows_server_2022 < 10.0.20348.4467
patched:
  - windows_10_1607 10.0.14393.8688
  - windows_10_1809 10.0.17763.8146
  - windows_10_21h2 10.0.19044.6691
  - windows_10_22h2 10.0.19045.6691
  - windows_11_23h2 10.0.22631.6345
  - windows_server_2016 10.0.14393.8688
  - windows_server_2019 10.0.17763.8146
  - windows_server_2022 10.0.20348.4467
published: '2025-12-09'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T20:10:00.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62458'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62458'
    label: secure@microsoft.com
tags:
  - nvd
epss: 0.00657
epssPercentile: 0.49549
ingestedAt: '2026-09-30T20:23:19.444Z'
---

## Overview

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

## Affected

- `windows_10_1607 < 10.0.14393.8688`
- `windows_10_1809 < 10.0.17763.8146`
- `windows_10_21h2 < 10.0.19044.6691`
- `windows_10_22h2 < 10.0.19045.6691`
- `windows_11_23h2 < 10.0.22631.6345`
- `windows_server_2008 = r2`
- `windows_server_2012`
- `windows_server_2012 = r2`
- `windows_server_2016 < 10.0.14393.8688`
- `windows_server_2019 < 10.0.17763.8146`
- `windows_server_2022 < 10.0.20348.4467`

## Remediation

Upgrade past the affected range:

- `windows_10_1607 10.0.14393.8688`
- `windows_10_1809 10.0.17763.8146`
- `windows_10_21h2 10.0.19044.6691`
- `windows_10_22h2 10.0.19045.6691`
- `windows_11_23h2 10.0.22631.6345`
- `windows_server_2016 10.0.14393.8688`
- `windows_server_2019 10.0.17763.8146`
- `windows_server_2022 10.0.20348.4467`