---
id: "CVE-2026-116706"
page: "https://infrastack.ai/live/CVE-2026-116706"
kind: "vulnerability"
aliases: ["CVE-2026-116706"]
title: "Windows LLTD use-after-free allows code execution from the same network segment (November 2026 patch)"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "windows", "fixed": ["see affected builds"], "affected": "Win10 1607/Server 2016 < 10.0.14393.9688; 1809/Server 2019 < 10.0.17763.9487; 21H2 < 10.0.19044.7846; 22H2 < 10.0.19045.7846; Win11 23H2 < 10.0.22631.7711; 24H2 < 10.0.26100.9974; 25H2 < 10.0.26200.9974; 26H1 < 10.0.28000.3501; 26H2 < 10.0.26300.9974; Server 2022 < 10.0.20348.5870; Server 2025 < 10.0.26100.33822", "ecosystem": "microsoft"}]
ecosystems: []
tags: ["infrastructure", "lltd", "network", "windows"]
not_affected_if: ["isolated-network", "patched-nov-2026"]
published_at: "2026-11-10T19:19:12+00:00"
first_seen_at: "2026-11-10T19:24:45+00:00"
updated_at: "2026-11-10T23:39:42+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116706", "first_seen_at": "2026-11-10T19:24:45+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-116706", "first_seen_at": "2026-11-10T23:39:42+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-116706", "https://nvd.nist.gov/vuln/detail/CVE-2026-116706"]}]
exploit_sources: []
---

# Windows LLTD use-after-free allows code execution from the same network segment (November 2026 patch)

Link for people: https://infrastack.ai/live/CVE-2026-116706 (this .md is for agents)

A use-after-free bug in the Windows Link Layer Topology Discovery protocol handling lets an unauthorized attacker run code on a machine. The attack travels over an adjacent network segment, so the attacker must be on the same local network.

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

## Affected

- microsoft:windows affected Win10 1607/Server 2016 < 10.0.14393.9688; 1809/Server 2019 < 10.0.17763.9487; 21H2 < 10.0.19044.7846; 22H2 < 10.0.19045.7846; Win11 23H2 < 10.0.22631.7711; 24H2 < 10.0.26100.9974; 25H2 < 10.0.26200.9974; 26H1 < 10.0.28000.3501; 26H2 < 10.0.26300.9974; Server 2022 < 10.0.20348.5870; Server 2025 < 10.0.26100.33822 fixed see affected builds

## How to check

Run winver or [System.Environment]::OSVersion.Version / (Get-ComputerInfo).OsBuildNumber and compare the full build (e.g. 10.0.26100.xxxx) with the fixed build for your release; lower means vulnerable. Whether LLTD (Link-Layer Topology Discovery Mapper/Responder, in the network adapter properties) is enabled by default was not stated in sources read; check it per adapter.

## Fix

Install the November 2026 Windows cumulative update. Fixed builds: Win10 1607/Server 2016 10.0.14393.9688; Win10 1809/Server 2019 10.0.17763.9487; Win10 21H2 10.0.19044.7846; Win10 22H2 10.0.19045.7846; Win11 23H2 10.0.22631.7711; Win11 24H2 10.0.26100.9974; Win11 25H2 10.0.26200.9974; Win11 26H1 10.0.28000.3501; Win11 26H2 10.0.26300.9974; Server 2022 10.0.20348.5870; Server 2025 10.0.26100.33822. KB numbers not read.

## Timeline

- 2026-11-10T19:24:45+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116706
- 2026-11-10T23:39:42+00:00 analyst https://app.opencve.io/cve/CVE-2026-116706 — MSRC page is JS-only and unreadable; affected/fixed builds taken from Microsoft CNA record via OpenCVE (secondary), so nothing marked verified. No exploitation or PoC found. Open: KB numbers, LLTD default state. Severity 7.5 unchanged.

## Documents

- [describes] OpenCVE: CVE-2026-116706 (Microsoft CNA record) https://app.opencve.io/cve/CVE-2026-116706
- [mentions] NVD CVE-2026-116706 https://nvd.nist.gov/vuln/detail/CVE-2026-116706

## From the sources

Use after free in Windows Link Layer Topology Discovery Protocol allows an unauthorized attacker to execute code over an adjacent network.

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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_