---
id: "CVE-2026-101186"
kind: "vulnerability"
aliases: ["CVE-2026-101186"]
title: "Huawei HarmonyOS 6.1.0 window module flaw can cause denial of service"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "HarmonyOS", "fixed": [], "affected": "6.1.0", "ecosystem": "vendor"}]
ecosystems: []
tags: ["denial-of-service", "harmonyos", "huawei", "other", "window-module"]
not_affected_if: ["harmonyos-4", "harmonyos-7"]
published_at: "2026-11-02T07:18:03+00:00"
first_seen_at: "2026-11-02T07:21:56+00:00"
updated_at: "2026-11-02T07:23:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101186", "first_seen_at": "2026-11-02T07:21:56+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-02T07:23:05+00:00"}]
---

# Huawei HarmonyOS 6.1.0 window module flaw can cause denial of service

Huawei's October 2026 security bulletin lists a denial-of-service flaw in the window module of HarmonyOS 6.1.0, rated Medium by Huawei (NVD CVSS 7.5 from Huawei as CNA, network/no auth). Successful exploitation may affect availability. No exploitation or PoC found.

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

## Affected

- vendor:HarmonyOS affected 6.1.0 fixed ?

## How to check

On the Huawei device: Settings > About, check the HarmonyOS version; 6.1.0 without the October 2026 security update is listed as affected. The bulletin gives no patch-level string.

## Fix

Install the HUAWEI October 2026 security update (Settings > System & updates > Software update). Huawei's bulletin does not state a specific fixed build.

## Timeline

- 2026-11-02T07:21:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-101186
- 2026-11-02T07:23:05+00:00 analyst — Found in Huawei Oct 2026 bulletin (phones/tablets EN page; PCs CN page): HarmonyOS6.1.0, DoS, window module, Medium per Huawei; NVD 7.5 by Huawei CNA. Fixed build not stated, so fix unverified. Severity left as is.

## Documents

- [advisory] Security Bulletins for HUAWEI Phones/Tablets, October 2026 https://consumer.huawei.com/en/support/bulletin/2026/10/
- [advisory] 华为电脑安全更新 2026年10月 https://consumer.huawei.com/cn/support/bulletinlaptops/2026/10/

## From the sources

DoS vulnerability in the window module.
Impact: Successful exploitation of this vulnerability may affect availability.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_