---
id: "CVE-2026-124226"
page: "https://infrastack.ai/live/CVE-2026-124226"
kind: "vulnerability"
aliases: ["CVE-2026-124226"]
title: "Microsoft PowerShell security feature bypass for local users (Windows 10, 11, Server)"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10/11 and Windows Server", "fixed": ["10.0.26100.9968", "10.0.26200.9968", "10.0.22631.7711", "10.0.19045.7846", "10.0.20348.5870", "10.0.26100.33812"], "affected": "below the Nov 2026 fixed build per version (e.g. Win11 24H2 < 10.0.26100.9968, Server 2022 < 10.0.20348.5870, Server 2025 < 10.0.26100.33812)", "ecosystem": "vendor"}]
ecosystems: []
tags: ["infrastructure", "local", "powershell", "windows"]
not_affected_if: ["no-local-accounts", "patched-nov-2026"]
published_at: "2026-11-10T19:20:49+00:00"
first_seen_at: "2026-11-10T19:25:13+00:00"
updated_at: "2026-11-10T21:27:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124226", "first_seen_at": "2026-11-10T19:25:13+00:00"}, {"source": "analyst", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124226", "first_seen_at": "2026-11-10T21:27:58+00:00", "cites": ["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124226", "https://app.opencve.io/cve/CVE-2026-124226"]}]
exploit_sources: []
---

# Microsoft PowerShell security feature bypass for local users (Windows 10, 11, Server)

Link for people: https://infrastack.ai/live/CVE-2026-124226 (this .md is for agents)

Windows PowerShell runs code with more privileges than it should, letting a signed-in attacker bypass a Windows security feature. The attacker needs an account on the machine first, and the flaw is only reachable locally.

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

## Affected

- vendor:Windows 10/11 and Windows Server affected below the Nov 2026 fixed build per version (e.g. Win11 24H2 < 10.0.26100.9968, Server 2022 < 10.0.20348.5870, Server 2025 < 10.0.26100.33812) fixed 10.0.26100.9968, 10.0.26200.9968, 10.0.22631.7711, 10.0.19045.7846, 10.0.20348.5870, 10.0.26100.33812

## How to check

Run 'winver' or PowerShell '[System.Environment]::OSVersion.Version' / 'Get-ComputerInfo OsBuildNumber' and compare the full build (e.g. 10.0.26100.xxxx) with the fixed build for your Windows version; lower means exposed.

## Fix

Install the November 2026 cumulative update that brings the build to at least: Win10 1607/Server 2016 10.0.14393.9688; 1809/Server 2019 10.0.17763.9487; Win10 21H2 10.0.19044.7846; 22H2 10.0.19045.7846; Win11 23H2 10.0.22631.7711; Win11 24H2 10.0.26100.9968; 25H2 10.0.26200.9968; 26H1 10.0.28000.3501; 26H2 10.0.26300.9968; Server 2022 10.0.20348.5870; Server 2025 10.0.26100.33812. KB numbers not read.

## Timeline

- 2026-11-10T19:25:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124226
- 2026-11-10T21:27:58+00:00 analyst https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124226 — Affected builds and fixed builds taken from Microsoft CNA data via OpenCVE/NVD mirror; MSRC page is JS-only and did not render, so nothing marked verified. Not exploited per sources; no PoC found. KB numbers unknown.

## Documents

- [advisory] MSRC: CVE-2026-124226 Microsoft PowerShell Security Feature Bypass Vulnerability (page did not render) https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124226
- [describes] OpenCVE: CVE-2026-124226 (Microsoft CNA affected builds) https://app.opencve.io/cve/CVE-2026-124226

## From the sources

Execution with unnecessary privileges in Windows PowerShell allows an authorized attacker to bypass a security feature 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_