---
id: "CVE-2026-112798"
page: "https://infrastack.ai/live/CVE-2026-112798"
kind: "vulnerability"
aliases: ["CVE-2026-112798"]
title: "Windows NetBIOS: use-after-free lets a local user gain higher privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "local-privilege-escalation", "netbios", "windows"]
not_affected_if: ["patched-november-2026"]
published_at: "2026-11-10T19:18:41+00:00"
first_seen_at: "2026-11-10T19:24:33+00:00"
updated_at: "2026-11-11T00:05:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112798", "first_seen_at": "2026-11-10T19:24:33+00:00"}, {"source": "analyst", "url": "https://advisories.checkpoint.com/defense/advisories/public/2026/cpai-2026-17616.html/", "first_seen_at": "2026-11-11T00:05:58+00:00", "cites": ["https://advisories.checkpoint.com/defense/advisories/public/2026/cpai-2026-17616.html/"]}]
exploit_sources: []
---

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

Link for people: https://infrastack.ai/live/CVE-2026-112798 (this .md is for agents)

A memory-handling flaw (use after free) in the Windows NetBIOS component lets an attacker who already has a local account raise their privileges. The sources do not say whether the attacker needs more than a standard logon.

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

## How to check

Run winver or 'Get-HotFix' and compare with the November 2026 Patch Tuesday cumulative update for your Windows version (Win 11 24H2/25H2/26H2: KB5132061; check the MSRC Security Update Guide entry for CVE-2026-112798 for other versions). Whether NetBIOS must be enabled is unknown; not stated in the sources I could read.

## Timeline

- 2026-11-10T19:24:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112798
- 2026-11-11T00:05:58+00:00 analyst https://advisories.checkpoint.com/defense/advisories/public/2026/cpai-2026-17616.html/ — Microsoft MSRC page is JS-only and the browser quota is exhausted, so no primary read. Check Point CPAI-2026-17616 (secondary, quoting Microsoft's affected list) gives the affected products. Fix KB/build not confirmed; nothing verified.

## Documents

- [describes] Check Point CPAI-2026-17616: Windows NetBIOS EoP (CVE-2026-112798) https://advisories.checkpoint.com/defense/advisories/public/2026/cpai-2026-17616.html/

## From the sources

Use after free in Windows NetBIOS 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_