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High · 8.8 CVE-2026-12562 EUVD-2026-51329GHSA-w374-9vqx-5hr2

Toptech Systems RCU II+ and Multiload II+ Missing Authentication for Critical Function

Published Jul 30, 2026 · Updated Jul 31, 2026 · Assigned by icscert

Description

The RCU II+ and Multiload II+ are vulnerable to an unauthenticated
service that exposes a debug interface granting full root-level access
to the embedded system. This vulnerability stems from a
network-accessible port running a Target Communications Framework (TCF)
service that does not require any authentication, allowing an attacker
to directly interact with the Linux environment that powers the device.
Once connected, an attacker can freely view and modify the filesystem,
manipulate running processes, and control network interfaces, enabling
deep alteration of system behavior.

Affected products

VendorProductAffectedFixed
Toptech Systems RCU II+ < 2025-11-24 2025-11-24
Toptech Systems Multiload II+ < 2025-11-24 2025-11-24

Advisories 1

References