---
id: "CVE-2026-125137"
page: "https://infrastack.ai/live/CVE-2026-125137"
kind: "vulnerability"
aliases: ["CVE-2026-125137"]
title: "Windows Graphics Kernel: heap overflow lets a local user gain higher privileges (fixed in November 2026 update)"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 / Windows Server 2019 (1809)", "fixed": ["10.0.17763.9487"], "affected": "< 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": "< 10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": "< 10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": "< 10.0.22631.7711", "ecosystem": "vendor"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": "< 10.0.26100.9974", "ecosystem": "vendor"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": "< 10.0.26200.9974", "ecosystem": "vendor"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": "< 10.0.28000.3501", "ecosystem": "vendor"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": "< 10.0.26300.9974", "ecosystem": "vendor"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": "< 10.0.20348.5870", "ecosystem": "vendor"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": "< 10.0.26100.33822", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["infrastructure", "local-users", "privilege-escalation", "windows", "windows-server"]
not_affected_if: ["no-local-logon", "patched-nov-2026"]
published_at: "2026-11-10T19:21:07+00:00"
first_seen_at: "2026-11-10T19:25:14+00:00"
updated_at: "2026-11-10T21:24:45+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125137", "first_seen_at": "2026-11-10T19:25:14+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-125137", "first_seen_at": "2026-11-10T21:24:45+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-125137", "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-125137"]}]
exploit_sources: []
---

# Windows Graphics Kernel: heap overflow lets a local user gain higher privileges (fixed in November 2026 update)

Link for people: https://infrastack.ai/live/CVE-2026-125137 (this .md is for agents)

A heap-based buffer overflow in the Windows Graphics Kernel lets an attacker who already has a local account raise their privileges. The sources do not describe a remote path or exploitation in the wild.

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

## Affected

- vendor:Windows 10 / Windows Server 2019 (1809) affected < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 21H2 affected < 10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 10 22H2 affected < 10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 11 23H2 affected < 10.0.22631.7711 fixed 10.0.22631.7711
- vendor:Windows 11 24H2 affected < 10.0.26100.9974 fixed 10.0.26100.9974
- vendor:Windows 11 25H2 affected < 10.0.26200.9974 fixed 10.0.26200.9974
- vendor:Windows 11 26H1 affected < 10.0.28000.3501 fixed 10.0.28000.3501
- vendor:Windows 11 26H2 affected < 10.0.26300.9974 fixed 10.0.26300.9974
- vendor:Windows Server 2022 affected < 10.0.20348.5870 fixed 10.0.20348.5870
- vendor:Windows Server 2025 affected < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

On each Windows machine run 'winver' or PowerShell '[System.Environment]::OSVersion.Version' and compare the full build (e.g. 10.0.26100.x) to the fixed build for your release; below it means unpatched. Windows Update history should list the November 2026 cumulative update.

## Fix

Install the November 2026 Windows cumulative update. Fixed builds: Win10 1809 / Server 2019 10.0.17763.9487; Win10 21H2 10.0.19044.7846; Win10 22H2 10.0.19045.7846; Win11 23H2 10.0.22631.7711; Win11 24H2 10.0.26100.9974; Win11 25H2 10.0.26200.9974; Win11 26H1 10.0.28000.3501; Win11 26H2 10.0.26300.9974; Server 2022 10.0.20348.5870; Server 2025 10.0.26100.33822. Confirm against the MSRC Update Guide entry.

## Timeline

- 2026-11-10T19:25:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125137
- 2026-11-10T21:24:45+00:00 analyst https://app.opencve.io/cve/CVE-2026-125137 — MSRC Update Guide page is JS-only and unreadable by tools; versions come from the Microsoft CNA record as mirrored by OpenCVE (not primary, so nothing verified). Nov 2026 Patch Tuesday; not exploited or publicly disclosed per press coverage. No PoC found. X/discussion not searched (low-signal local EoP).

## Documents

- [describes] OpenCVE: CVE-2026-125137 (mirrors Microsoft CNA record) https://app.opencve.io/cve/CVE-2026-125137
- [mentions] MSRC Update Guide: CVE-2026-125137 (not readable by tools, JS page) https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-125137

## From the sources

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

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