View CSAF Summary Successful exploitation of these vulnerabilities could result in an attacker bypassing authentication, or resetting the device password. The following versions of ZLAN Information Technology Co. ZLAN5143D are affected: ZLAN5143D v1.600 (CVE-2026-25084, CVE-2026-24789) CVSS Vendor Equipment Vulnerabilities v3 9.8 ZLAN Information Technology Co. ZLAN Information Technology Co. ZLAN5143D Missing Authentication for Critical Function Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: China Vulnerabilities Expand All + CVE-2026-25084 Authentication for the device can be bypassed by directly accessing internal URLs. View CVE Details Affected Products ZLAN Information Technology Co. ZLAN5143D Vendor: ZLAN Information Technology Co. Product Version: ZLAN Information Technology Co. ZLAN5143D: v1.600 Product Status: known_affected Remediations Vendor fix ZLAN Information Technology Co. did not respond to CISA's attempts at coordination. Users of ZLAN5143D devices are encouraged to contact ZLAN and keep their systems up to date. https://www.zlmcu.com/en/contatct_us.htm Relevant CWE: CWE-306 Missing Authentication for Critical Function Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-24789 An unprotected API endpoint allows an attacker to remotely change the device password without providing authentication. View CVE Details Affected Products ZLAN Information Technology Co. ZLAN5143D Vendor: ZLAN Information Technology Co. Product Version: ZLAN Information Technology Co. ZLAN5143D: v1.600 Product Status: known_affected Remediations Vendor fix ZLAN Information Technology Co. did not respond to CISA's attempts at coordination. Users of ZLAN5143D devices are encouraged to contact ZLAN and keep their systems up to date. https://www.zlmcu.com/en/contatct_us.htm Relevant CWE: CWE-306 Missing Authentication for Critical Function Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Acknowledgments Shorabh Karir and Deepak Singh of KPMG reported these vulnerabilities to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. 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. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. 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. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. 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. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-02-10 Date Revision Summary 2026-02-10 1 Initial Publication Legal Notice and Terms of Use