{ "document": { "acknowledgments": [ { "names": [ "Donald Green" ], "organization": "Southwest Research Institute", "summary": "reported this vulnerability to CISA" } ], "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Disclosure is not limited", "tlp": { "label": "WHITE", "url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage" } }, "lang": "en-US", "notes": [ { "category": "legal_disclaimer", "text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).", "title": "Legal Notice and Terms of Use" }, { "category": "summary", "text": "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.", "title": "Advisory Summary" }, { "category": "other", "text": "Energy", "title": "Critical infrastructure sectors" }, { "category": "other", "text": "Worldwide", "title": "Countries/areas deployed" }, { "category": "other", "text": "United States", "title": "Company headquarters location" }, { "category": "general", "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.", "title": "Recommended Practices" }, { "category": "general", "text": "Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.", "title": "Recommended Practices" }, { "category": "general", "text": "Locate control system networks and remote devices behind firewalls and isolating them from business networks.", "title": "Recommended Practices" }, { "category": "general", "text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.", "title": "Recommended Practices" }, { "category": "general", "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.", "title": "Recommended Practices" }, { "category": "general", "text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.", "title": "Recommended Practices" }, { "category": "general", "text": "No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.", "title": "Recommended Practices" } ], "publisher": { "category": "coordinator", "contact_details": "central@cisa.dhs.gov", "name": "CISA", "namespace": "https://www.cisa.gov/" }, "references": [ { "category": "self", "summary": "ICS Advisory ICSA-26-211-03 JSON", "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-211-03.json" }, { "category": "self", "summary": "ICSA Advisory ICSA-26-211-03 - Web Version", "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-03" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/topics/industrial-control-systems" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks" } ], "title": "Toptech Systems RCU II+ and Multiload II+", "tracking": { "current_release_date": "2026-07-30T06:00:00.000000Z", "generator": { "date": "2026-07-29T18:50:50.800877Z", "engine": { "name": "CISA CSAF Generator", "version": "1.0.0" } }, "id": "ICSA-26-211-03", "initial_release_date": "2026-07-30T06:00:00.000000Z", "revision_history": [ { "date": "2026-07-30T06:00:00.000000Z", "legacy_version": "Initial", "number": "1", "summary": "Initial Publication" } ], "status": "final", "version": "1" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "<2025-11-24", "product": { "name": "Toptech Systems RCU II+: <2025-11-24", "product_id": "CSAFPID-0001" } } ], "category": "product_name", "name": "RCU II+" }, { "branches": [ { "category": "product_version_range", "name": "<2025-11-24", "product": { "name": "Toptech Systems Multiload II+: <2025-11-24", "product_id": "CSAFPID-0002" } } ], "category": "product_name", "name": "Multiload II+" } ], "category": "vendor", "name": "Toptech Systems" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-12562", "cwe": { "id": "CWE-306", "name": "Missing Authentication for Critical Function" }, "notes": [ { "category": "summary", "text": "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.", "title": "Vulnerability Summary" }, { "category": "details", "text": "SSVCv2/E:N/A:N/2026-07-29T06:00:00.000000Z", "title": "SSVC" } ], "product_status": { "known_affected": [ "CSAFPID-0001", "CSAFPID-0002" ] }, "references": [ { "category": "external", "summary": "cwe.mitre.org", "url": "https://cwe.mitre.org/data/definitions/306.html" }, { "category": "external", "summary": "www.cve.org", "url": "https://www.cve.org/CVERecord?id=CVE-2026-12562" }, { "category": "external", "summary": "www.first.org", "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "category": "external", "summary": "www.first.org", "url": "https://www.first.org/cvss/calculator/4.0#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" } ], "remediations": [ { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ] }, { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ], "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip" }, { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ], "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz" }, { "category": "mitigation", "details": "This option does not require breaking Weights and Measures seals and has the least operational impact.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ] }, { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ], "url": "https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/" }, { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ] }, { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ], "url": "mailto:security@toptech.com" }, { "category": "mitigation", "details": "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.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002" ], "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf" } ], "scores": [ { "cvss_v3": { "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "CSAFPID-0001", "CSAFPID-0002" ] } ] } ] }