---
id: "CVE-2019-0863"
kind: "vulnerability"
aliases: ["CVE-2019-0863"]
title: "Microsoft Windows: Microsoft Windows Error Reporting (WER) Privilege Escalation Vulnerability"
severity: "high"
cvss: 7.8
epss: 0.05207
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "microsoft-windows", "windows"]
not_affected_if: ["unknown"]
published_at: "2019-05-16T19:29:00+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:34+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-0863", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2019-0863", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-0863", "first_seen_at": "2026-10-23T21:57:34+00:00"}]
---

# Microsoft Windows: Microsoft Windows Error Reporting (WER) Privilege Escalation Vulnerability

Microsoft Windows Error Reporting (WER) mishandles files, letting a local user escalate privileges. The sources say an attacker can run code in kernel mode.

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

## Affected

- vendor:Microsoft Windows affected ? fixed ?

## Fix

Apply the Microsoft updates for this CVE per vendor instructions, as CISA requires; the sources do not name the patched build.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-0863
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2019-0863
- 2026-10-23T21:57:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2019-0863

## From the sources

Microsoft Windows Error Reporting (WER) contains a privilege escalation vulnerability due to the way it handles files, allowing for code execution in kernel mode.

CISA required action: Apply updates per vendor instructions.

---

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