# CVE-2026-18769: Insufficient IOCTL access control allows local relocation of arbitrary physical memory

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Beckhoff Automation / TcRouter.sys for Windows on x64 3.1.0.2364: 3.1.0.2364 (affected). Source: CNA: CERTVDE
- Beckhoff Automation / TcRouter.sys for Windows on x64 <3.1.0.2365: ≥ 1.0.0; < 3.1.0.2365 (affected, semver). Source: CNA: CERTVDE
- Beckhoff Automation / TcRouter.sys for Windows on x86 3.1.0.2364: 3.1.0.2364 (affected). Source: CNA: CERTVDE
- Beckhoff Automation / TcRouter.sys for Windows on x86 <3.1.0.2365: ≥ 1.0.0; < 3.1.0.2365 (affected, semver). Source: CNA: CERTVDE
- Beckhoff Automation / TwinCAT.XAR.Base.KM 3.16.29: 3.16.29 (affected). Source: CNA: CERTVDE
- Beckhoff Automation / TwinCAT.XAR.Base.KM <3.18.1: ≥ 1.0.0; < 3.18.1 (affected, semver). Source: CNA: CERTVDE

## Severity and prioritization

- CVSS 4.0: 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; source: CNA: CERTVDE

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: CERTVDE

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-782

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.certvde.com/en/advisories/VDE-2026-087/ (CNA: CERTVDE)

## Provenance

- CNA: CERTVDE: https://www.cve.org/CVERecord?id=CVE-2026-18769; retrieved 2026-11-11; source updated 2026-11-11

Revision: aea310970a2fc306b8670017cb0f2936c08c1ff1f99fbac2c6c45a4a58f29d8f

Canonical: https://y2.dev/cve/CVE-2026-18769

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