---
id: "CVE-2019-1132"
kind: "vulnerability"
aliases: ["CVE-2019-1132"]
title: "Microsoft Win32k: Microsoft Win32k Privilege Escalation Vulnerability"
severity: "high"
cvss: 7.8
epss: 0.09867
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Win32k", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "win32k", "windows"]
not_affected_if: ["patched-windows"]
published_at: "2019-07-15T19:15:21+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-1132", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2019-1132", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1132", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Microsoft Win32k: Microsoft Win32k Privilege Escalation Vulnerability

Microsoft Windows Win32k kernel component mishandles objects in memory, allowing privilege escalation. A local user who already has code running on the machine can gain higher privileges, such as SYSTEM.

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

## Affected

- vendor:Microsoft Win32k affected ? fixed ?

## Fix

Apply the Microsoft security update for CVE-2019-1132 per vendor instructions, as CISA's required action states. Exact patched build numbers are unknown from the sources.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-1132
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2019-1132
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2019-1132

## From the sources

A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory.

CISA required action: Apply updates per vendor instructions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_