Beckhoff Automation TcRouter.sys/TwinCAT.XAR.Base.KM prior 3.1.0.2365/3.18.1 IOCTL TcRouter.sys privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.1$0-$5k0.00+

Summaryinfo

A vulnerability marked as very critical has been reported in Beckhoff Automation TcRouter.sys and TwinCAT.XAR.Base.KM. The affected element is an unknown function of the file TcRouter.sys of the component IOCTL Handler. Performing a manipulation results in privileges management. This vulnerability is known as CVE-2026-18767. Attacking locally is a requirement. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Beckhoff Automation TcRouter.sys and TwinCAT.XAR.Base.KM. It has been classified as very critical. This affects an unknown code of the file TcRouter.sys of the component IOCTL Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A local low privileged attacker or process can access I/O ports via TcRouter.sys because of exposed IOCTL function calls resulting in a full compromise of the affected devices.

The advisory is shared at certvde.com. This vulnerability is uniquely identified as CVE-2026-18767 since 08/04/2026. The exploitability is told to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/11/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 3.1.0.2365 or 3.18.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (CERTVDE): 🔒

CVSSv2info

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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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: TcRouter.sys/TwinCAT.XAR.Base.KM 3.1.0.2365/3.18.1

Timelineinfo

08/04/2026 CVE reserved
11/11/2026 +99 days Advisory disclosed
11/11/2026 +0 days VulDB entry created
11/11/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: certvde.com
Status: Confirmed

CNA: CERTVDE
CVE: CVE-2026-18767 (🔒)

GCVE (CVE): GCVE-0-2026-18767
GCVE (VulDB): GCVE-100-435705

Entryinfo

Created: 11/11/2026 09:37
Changes: 11/11/2026 09:37 (76)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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