---
id: "CVE-2026-105522"
page: "https://infrastack.ai/live/CVE-2026-105522"
kind: "vulnerability"
aliases: ["CVE-2026-105522"]
title: "Windows Winlogon: use-after-free lets an authorized user gain higher privileges locally"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "local-privilege-escalation", "race-condition", "windows", "winlogon"]
not_affected_if: []
published_at: "2026-11-10T19:17:51+00:00"
first_seen_at: "2026-11-10T19:24:17+00:00"
updated_at: "2026-11-11T01:02:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105522", "first_seen_at": "2026-11-10T19:24:17+00:00"}, {"source": "analyst", "url": "https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-105522", "first_seen_at": "2026-11-11T01:02:28+00:00", "cites": ["https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-105522"]}]
exploit_sources: []
---

# Windows Winlogon: use-after-free lets an authorized user gain higher privileges locally

Link for people: https://infrastack.ai/live/CVE-2026-105522 (this .md is for agents)

A use-after-free in Windows Winlogon lets a local attacker with a low-privilege account gain SYSTEM, but only by winning a race condition (high attack complexity). Microsoft rates it Important, CVSS 7.0, not exploited or publicly disclosed, Exploitation Less Likely. Released in the November 2026 Patch Tuesday.

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

## How to check

Microsoft's data lists no affected builds or KB numbers that we could read. Open the Microsoft Security Update Guide entry for CVE-2026-105522, match your Windows edition to its KB, and compare with installed updates (Get-HotFix or Settings > Windows Update > Update history).

## Timeline

- 2026-11-10T19:24:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-105522
- 2026-11-11T01:02:28+00:00 analyst https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-105522 — MSRC data (sug API; update-guide page is JS-only) read: Important EoP, race condition, SYSTEM, not exploited, not disclosed, Exploitation Less Likely, customer action required. No KB or build list reachable, so fix and affected builds unknown; nothing marked verified. X/search not used.

## Documents

- [advisory] MSRC: CVE-2026-105522 Winlogon Elevation of Privilege Vulnerability https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-105522

## From the sources

Use after free in Winlogon allows an authorized attacker to elevate privileges locally.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_