Vulnerability record
CVE-2026-18768
The short answer
CVE-2026-18768 affects Beckhoff Automation TcRouter.sys for Windows on x64 3.1.0.2364 and is rated high (CVSS 8.5). It is not in CISA's Known Exploited Vulnerabilities catalog.
What it is
A local low privileged attacker can access arbitrary physical memory or define its mapping via TcRouter.sys because of exposed IOCTL function calls resulting in a full compromise of the affected devices.
Weakness: CWE-782.
Severity
8.5 high
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
No score
FIRST scores CVEs within a day of publication
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Affected products
TcRouter.sys for Windows on x64 3.1.0.2364, TcRouter.sys for Windows on x64 <3.1.0.2365, TcRouter.sys for Windows on x86 3.1.0.2364, TcRouter.sys for Windows on x86 <3.1.0.2365, TwinCAT.XAR.Base.KM 3.16.29, TwinCAT.XAR.Base.KM <3.18.1. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-18768 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-11.
How do I fix CVE-2026-18768?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Received. The description is NVD's text, quoted as published.
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