---
id: "CVE-2026-106781"
kind: "vulnerability"
aliases: ["CVE-2026-106781"]
title: "WCH CH340/CH341 Windows driver installer lets local users escalate privileges"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["hardware-tooling", "infrastructure", "usb-serial", "windows"]
not_affected_if: ["package-not-installed"]
published_at: "2026-10-26T15:16:35+00:00"
first_seen_at: "2026-10-26T16:02:25+00:00"
updated_at: "2026-10-26T16:04:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106781", "first_seen_at": "2026-10-26T16:02:25+00:00"}]
---

# WCH CH340/CH341 Windows driver installer lets local users escalate privileges

The WCH CH340/CH341 USB-to-serial Windows driver setup package CH341SER.EXE version 4.0 contains a flaw that lets a local attacker escalate privileges. The sources do not describe the exact mechanism.

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

## How to check

- Look for CH341SER.EXE on Windows machines and check its file version with the file properties dialog
- unknown for further checks: the sources do not say how the version is reported or which installed driver files to compare

## Fix

- Move off CH341SER.EXE version 4.0 to a newer vendor driver release from WCH
- unknown for the exact fixed version: the sources do not say

## Timeline

- 2026-10-26T16:02:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-106781

## From the sources

An issue in WCH CH340/CH341 USB-to-Serial Windows Driver setup package CH341SER.EXE version 4.0 allows a local attacker to escalate privileges.

---

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