Toptech Systems RCU II+ and Multiload II+

View CSAF Summary Successful exploitation of this vulnerability could allow an attacker to gain full system control and misuse it to access or manipulate connected networks and resources. The following versions of Toptech Systems RCU II+ and Multiload II+ are affected: RCU II+ <2025-11-24 (CVE-2026-12562) Multiload II+ <2025-11-24 (CVE-2026-12562) CVSS Vendor Equipment Vulnerabilities v3 8.8 Toptech Systems Toptech Systems RCU II+ and Multiload II+ Missing Authentication for Critical Function Background Critical Infrastructure Sectors: Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-12562 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. View CVE Details Affected Products Toptech Systems RCU II+ and Multiload II+ Vendor: Toptech Systems Product Version: Toptech Systems RCU II+: <2025-11-24, Toptech Systems Multiload II+: <2025-11-24 Product Status: known_affected Remediations Mitigation Toptech Systems provides two methods for remediating affected RCU II+ and Multiload II+ units: First, move the device to a closed or segmented network without untrusted access. Mitigation Run one of the RCU II+/Multiload II+ Vulnerability Removal Tools (VRT) available at https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip, https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz. *-* This option does not require breaking Weights and Measures seals and has the least operational impact. https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip Mitigation Run one of the RCU II+/Multiload II+ Vulnerability Removal Tools (VRT) available at https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip, https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz. *-* This option does not require breaking Weights and Measures seals and has the least operational impact. https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz Mitigation This option does not require breaking Weights and Measures seals and has the least operational impact. Mitigation Install the latest firmware from https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/. *-* This method requires stopping the bay and breaking the W&M seal. Be sure to back up the current ML configuration before performing the firmware update. https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/ Mitigation This method requires stopping the bay and breaking the W&M seal. Be sure to back up the current ML configuration before performing the firmware update. Mitigation For questions, contact Toptech Systems Support at security@toptech.com. Additional details are available in Toptech System's firmware vulnerability notice: https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf. mailto:security@toptech.com Mitigation For questions, contact Toptech Systems Support at security@toptech.com. Additional details are available in Toptech System's firmware vulnerability notice: https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf. https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf Relevant CWE: CWE-306 Missing Authenticat