---
id: "CVE-2026-70231"
page: "https://infrastack.ai/live/CVE-2026-70231"
kind: "vulnerability"
aliases: ["CVE-2026-70231"]
title: "Windows LSASS: use-after-free lets a local user gain privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["active-directory", "infrastructure", "local-privilege-escalation", "lsass", "windows"]
not_affected_if: []
published_at: "2026-11-10T19:21:20+00:00"
first_seen_at: "2026-11-10T19:25:17+00:00"
updated_at: "2026-11-10T21:13:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70231", "first_seen_at": "2026-11-10T19:25:17+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-10T21:13:31+00:00"}]
exploit_sources: []
---

# Windows LSASS: use-after-free lets a local user gain privileges

Link for people: https://infrastack.ai/live/CVE-2026-70231 (this .md is for agents)

A use-after-free bug in the Windows Local Security Authority Subsystem Service (LSASS) lets an attacker who already has an account on the machine raise their privileges. The sources give a CVSS score of 7.0 and do not describe the exact trigger or any exploitation.

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

## How to check

Run winver (or Get-ComputerInfo) for the Windows build, then compare it to the fixed build listed for CVE-2026-70231 in the Microsoft Security Update Guide. Fixed build and KB are not yet confirmed by us. Or check installed updates with Get-HotFix once the KB is known.

## Timeline

- 2026-11-10T19:25:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-70231
- 2026-11-10T21:13:31+00:00 analyst — Could not read the MSRC or NVD entry: both are JS-only and WebFetch/web-cli returned no content. Affected builds, KB and exploitation status remain unknown. Nothing verified; X and search not tried. Settle with the MSRC Update Guide page in a browser or the Nov 2026 Patch Tuesday release notes.

## From the sources

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to elevate privileges locally.

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