MZ Automation lib60870

Summary

MZ Automation lib60870 versions 2.4.0 and earlier are vulnerable to an out-of-bounds read (CVE-2026-16002) that allows attackers to crash the parsing process and cause denial of service. The vulnerability affects critical infrastructure sectors including chemical, energy, and water/wastewater systems worldwide. MZ Automation recommends users update to version 2.4.1 or later; no public exploitation has been reported as of the advisory date.

Full text

ICS Advisory MZ Automation lib60870 Release DateJuly 23, 2026 Alert CodeICSA-26-204-07 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of this vulnerability could cause the parsing process to crash, which will cause a denial of service. The following versions of MZ Automation lib60870 are affected: lib60870 <=2.4.0 CVSS Vendor Equipment Vulnerabilities v3 8.2 MZ Automation MZ Automation lib60870 Out-of-bounds Read Background Critical Infrastructure Sectors: Chemical, Energy, Water and Wastewater Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-16002 The affected product is vulnerable to an Out-of-bounds read, which may allow an attacker to crash the parsing process and cause a denial of service. View CVE Details Affected Products MZ Automation lib60870 Vendor:MZ Automation Product Version:MZ Automation lib60870: <=2.4.0 Product Status:known_affected Remediations Vendor fixMZ automation recommends users update to version 2.4.1 or later. Documentation can be found at https://github.com/mz-automation/lib60870/security/advisories/GHSA-f5xp-w6f3-vvrv.https://github.com/mz-automation/lib60870/security/advisories/GHSA-f5xp-w6f3-vvrv Relevant CWE: CWE-125 Out-of-bounds Read Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.2 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H 4.0 8.8 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N Acknowledgments Lars Tray reported this vulnerability 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 this (these) vulnerability(ies). 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. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-07-23 Date Revision Summary 2026-07-23 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Vendor MZ Automation GmbH Tags Sector: Chemical Sector, Energy Sector, Water and Wastewater Systems Topics: Industrial Control System Vulnerabilities, Industrial Control Systems Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback. Related Advisories Jul 23, 2026 ICS Advisory | ICSA-26-204-03 Weintek cMT3092X Jul 23, 2026 ICS Advisory | ICSA-26-204-01 Johnson Controls C-CURE 9000 and Victor application server Jul 23, 2026 ICS Advisory | ICSA-26-204-04 Panduit IntraVUE Jul 23, 2026 ICS Advisory | ICSA-26-204-06 MZ Automation libIEC61850

Indicators of Compromise

• cve — CVE-2026-16002
• url — https://github.com/mz-automation/lib60870/security/advisories/GHSA-f5xp-w6f3-vvrv

Entities