PT-2026-66615 · Toptech Systems · Multiload Ii++1

Donald Green · CVE-2026-12562 · Published 2026-07-30 · Updated 2026-07-30

Mitre

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2026-12562

Affected Products

Multiload Ii+

Rcu Ii+

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-12562 · Security Note
• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-03.json · Note
• https://cisa.gov/news-events/ics-advisories/icsa-26-211-03 · Note
• https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz · Note
• https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+ · Note
• https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf · Note
• https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip · Note