CVE-2026-187677.8HighCWE-782

CVE-2026-18767: Insufficient IOCTL access control allows local access to I/O ports

Beckhoff Automation · TcRouter.sys for Windows on x64 3.1.0.2364

Vendor fix available · Affected: Beckhoff Automation TcRouter.sys for Windows on x64 3.1.0.2364 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.1%probability of exploitation in the next 30 days

3rd percentile

050100

Higher than 3% of scored CVEs

7.8HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products6

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Beckhoff Automation · TcRouter.sys for Windows on x64 3.1.0.23643.1.0.2364
Beckhoff Automation · TcRouter.sys for Windows on x64 <3.1.0.2365from 1.0.0 before 3.1.0.2365
Beckhoff Automation · TcRouter.sys for Windows on x86 3.1.0.23643.1.0.2364
Beckhoff Automation · TcRouter.sys for Windows on x86 <3.1.0.2365from 1.0.0 before 3.1.0.2365
Beckhoff Automation · TwinCAT.XAR.Base.KM 3.16.293.16.29
Beckhoff Automation · TwinCAT.XAR.Base.KM <3.18.1from 1.0.0 before 3.18.1

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Exposed IOCTL with Insufficient Access Control · Access Control
Vendor: Beckhoff Automation
Published: November 2026
Band: Unlikely (under 1%), November 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-18767 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.