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Fencer Intel
high 7.8

CVE-2026-18769 json

Insufficient IOCTL access control allows local relocation of arbitrary physical memory

published yesterday modified yesterday also EUVD-2026-123320

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

A local low privileged attacker can move arbitrary physical memory content via TcRouter.sys because of exposed IOCTL function calls resulting in a full compromise of the affected devices.

Patch / fix

  • Beckhoff Automation TcRouter.sys for Windows on x64 <3.1.0.2365 3.1.0.2365
  • Beckhoff Automation TcRouter.sys for Windows on x86 <3.1.0.2365 3.1.0.2365
  • Beckhoff Automation TwinCAT.XAR.Base.KM <3.18.1 3.18.1

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Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 8.5 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
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 8.5 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
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Beckhoff Automation TcRouter.sys for Windows on x64 3.1.0.2364
  • Beckhoff Automation TcRouter.sys for Windows on x64 <3.1.0.2365
  • Beckhoff Automation TcRouter.sys for Windows on x86 3.1.0.2364
  • Beckhoff Automation TcRouter.sys for Windows on x86 <3.1.0.2365
  • Beckhoff Automation TwinCAT.XAR.Base.KM 3.16.29
  • Beckhoff Automation TwinCAT.XAR.Base.KM <3.18.1

Classification

Weakness
  • CWE-782 Exposed IOCTL with Insufficient Access Control

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.