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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-12562 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  ICS-CERT
CVSS-B 8.7 HIGH
Vector:  CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-03.json ICS-CERT
https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/ ICS-CERT
https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf ICS-CERT
https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz ICS-CERT
https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip ICS-CERT
https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-03 ICS-CERT

Weakness Enumeration

CWE-ID CWE Name Source
CWE-306 Missing Authentication for Critical Function ICS-CERT  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-12562
NVD Published Date:
07/30/2026
NVD Last Modified:
07/31/2026
Source:
ICS-CERT