WCH CH340 CH341 USB-to-Serial Driver 4.0 CH341SER.EXE privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.8$0-$5k0.97-

Summaryinfo

A vulnerability was found in WCH CH340 CH341 USB-to-Serial Driver 4.0. It has been rated as very critical. Impacted is an unknown function of the file CH341SER.EXE. This manipulation causes privileges management. This vulnerability is registered as CVE-2026-106781. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability classified as very critical was found in WCH CH340 CH341 USB-to-Serial Driver 4.0. Affected by this vulnerability is an unknown function of the file CH341SER.EXE. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at wch-ic.com. This vulnerability is known as CVE-2026-106781 since 10/07/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/26/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/07/2026 CVE reserved
10/26/2026 +19 days Advisory disclosed
10/26/2026 +0 days VulDB entry created
10/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: wch-ic.com
Status: Not defined

CVE: CVE-2026-106781 (🔒)
GCVE (CVE): GCVE-0-2026-106781
GCVE (VulDB): GCVE-100-426475

Entryinfo

Created: 10/26/2026 16:12
Changes: 10/26/2026 16:12 (53)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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