---
id: "CVE-2026-88233"
page: "https://infrastack.ai/live/CVE-2026-88233"
kind: "vulnerability"
aliases: ["CVE-2026-88233"]
title: "Windows Task Scheduler: local user can gain elevated privileges"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "local-privilege-escalation", "task-scheduler", "windows", "windows-server"]
not_affected_if: ["no-local-user-access", "no-local-users"]
published_at: "2026-11-10T19:21:32+00:00"
first_seen_at: "2026-11-10T19:25:20+00:00"
updated_at: "2026-11-10T20:43:40+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88233", "first_seen_at": "2026-11-10T19:25:20+00:00"}, {"source": "analyst", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/updates/CVE-2026-88233", "first_seen_at": "2026-11-10T20:43:40+00:00", "cites": ["https://api.msrc.microsoft.com/cvrf/v3.0/updates/CVE-2026-88233"]}]
exploit_sources: []
---

# Windows Task Scheduler: local user can gain elevated privileges

Link for people: https://infrastack.ai/live/CVE-2026-88233 (this .md is for agents)

Windows Task Scheduler has an authorization flaw that lets an already-logged-in attacker raise their privileges on the same machine. The sources give a CVSS score of 7.8 and do not describe the exact exploit path.

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

## How to check

Install the November 2026 (2026-11-10) Windows cumulative update; the CVE is listed in that MSRC release. Look up your Windows edition and build for CVE-2026-88233 in the Microsoft Security Update Guide to get the exact KB, then compare with winver or Get-HotFix. Exact patched builds not yet read.

## Fix

Apply the November 2026 Microsoft security update for your Windows version. Exact KB and build numbers unknown; open the Security Update Guide entry for CVE-2026-88233 to settle.

## Timeline

- 2026-11-10T19:25:20+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-88233
- 2026-11-10T20:43:40+00:00 analyst https://api.msrc.microsoft.com/cvrf/v3.0/updates/CVE-2026-88233 — MSRC API confirms CVE is part of the Nov 2026 (2026-11-10) Patch Tuesday; the Update Guide page is JS-only and the CVRF doc returned empty, so affected builds/KBs not read. Nothing verified.

## Documents

- [advisory] MSRC CVRF update index for CVE-2026-88233 https://api.msrc.microsoft.com/cvrf/v3.0/updates/CVE-2026-88233

## From the sources

Improper authorization in Windows Task Scheduler 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_