---
id: "CVE-2026-118124"
page: "https://infrastack.ai/live/CVE-2026-118124"
kind: "vulnerability"
aliases: ["CVE-2026-118124"]
title: "Windows ICS: out-of-bounds read lets a local user gain privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows Internet Connection Sharing", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "Windows 10 1607 / Server 2016", "fixed": ["10.0.14393.9688"], "affected": ">= 10.0.14393.0, < 10.0.14393.9688", "ecosystem": "vendor"}, {"name": "Windows 10 1809 / Server 2019", "fixed": ["10.0.17763.9487"], "affected": ">= 10.0.17763.0, < 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": ">= 10.0.19044.0, < 10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": ">= 10.0.19045.0, < 10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": ">= 10.0.22631.0, < 10.0.22631.7711", "ecosystem": "vendor"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": ">= 10.0.26100.0, < 10.0.26100.9974", "ecosystem": "vendor"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": ">= 10.0.26200.0, < 10.0.26200.9974", "ecosystem": "vendor"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": ">= 10.0.28000.0, < 10.0.28000.3501", "ecosystem": "vendor"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": ">= 10.0.26300.0, < 10.0.26300.9974", "ecosystem": "vendor"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": ">= 10.0.20348.0, < 10.0.20348.5870", "ecosystem": "vendor"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": ">= 10.0.26100.0, < 10.0.26100.33822", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["infrastructure", "internet-connection-sharing", "local-privilege-escalation", "windows", "windows-server"]
not_affected_if: []
published_at: "2026-11-10T19:19:31+00:00"
first_seen_at: "2026-11-10T19:24:48+00:00"
updated_at: "2026-11-10T23:25:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118124", "first_seen_at": "2026-11-10T19:24:48+00:00"}, {"source": "analyst", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118124", "first_seen_at": "2026-11-10T23:25:36+00:00", "cites": ["https://nvd.nist.gov/vuln/detail/CVE-2026-118124"]}]
exploit_sources: []
---

# Windows ICS: out-of-bounds read lets a local user gain privileges

Link for people: https://infrastack.ai/live/CVE-2026-118124 (this .md is for agents)

Windows Internet Connection Sharing has an out-of-bounds read flaw. An authorized local attacker can use it to elevate privileges on the machine.

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

## Affected

- vendor:Windows Internet Connection Sharing affected range not listed fixed no fixed version listed
- vendor:Windows 10 1607 / Server 2016 affected >= 10.0.14393.0, < 10.0.14393.9688 fixed 10.0.14393.9688
- vendor:Windows 10 1809 / Server 2019 affected >= 10.0.17763.0, < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 21H2 affected >= 10.0.19044.0, < 10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 10 22H2 affected >= 10.0.19045.0, < 10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 11 23H2 affected >= 10.0.22631.0, < 10.0.22631.7711 fixed 10.0.22631.7711
- vendor:Windows 11 24H2 affected >= 10.0.26100.0, < 10.0.26100.9974 fixed 10.0.26100.9974
- vendor:Windows 11 25H2 affected >= 10.0.26200.0, < 10.0.26200.9974 fixed 10.0.26200.9974
- vendor:Windows 11 26H1 affected >= 10.0.28000.0, < 10.0.28000.3501 fixed 10.0.28000.3501
- vendor:Windows 11 26H2 affected >= 10.0.26300.0, < 10.0.26300.9974 fixed 10.0.26300.9974
- vendor:Windows Server 2022 affected >= 10.0.20348.0, < 10.0.20348.5870 fixed 10.0.20348.5870
- vendor:Windows Server 2025 affected >= 10.0.26100.0, < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

Run 'winver' or PowerShell '[System.Environment]::OSVersion.Version' and compare the build (10.0.x.y) with the fixed build for your release. Also check whether ICS is in use: 'Get-Service SharedAccess' (running = ICS/Internet sharing service active). Whether ICS must be enabled to be exposed is not stated by the source.

## Fix

Install the November 2026 Windows cumulative update for your release: build at or above the fixed build listed per product (e.g. Windows 11 24H2 10.0.26100.9974, Windows 10 22H2 10.0.19045.7846, Server 2022 10.0.20348.5870, Server 2025 10.0.26100.33822).

## Timeline

- 2026-11-10T19:24:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118124
- 2026-11-10T23:25:36+00:00 analyst https://nvd.nist.gov/vuln/detail/CVE-2026-118124 — Builds/fixed versions from Microsoft CNA data on NVD; MSRC page not readable (JS), so nothing marked verified. Whether ICS must be enabled is not stated; no exploitation or PoC found.

## Documents

- [describes] NVD CVE-2026-118124 (Microsoft CNA data) https://nvd.nist.gov/vuln/detail/CVE-2026-118124

## From the sources

Out-of-bounds read in Windows Internet Connection Sharing (ICS) 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_