Rockwell Automation Historian ME

Summary

Rockwell Automation has disclosed two vulnerabilities in its Historian ME software, affecting critical infrastructure sectors. CVE-2025-12768 allows for remote code execution with low-level authentication, while CVE-2026-12661 enables a denial-of-service attack via crafted web interface requests. Both vulnerabilities impact specific versions of Series B and Series C.

Full text

ICS Advisory Rockwell Automation Historian ME Release DateSeptember 01, 2026 Alert CodeICSA-26-244-06 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of these vulnerabilities could crash the device being accessed; an out-of-bounds write condition may allow remote code execution. The following versions of Rockwell Automation Historian ME are affected: Series B 5.202 (CVE-2025-12768, CVE-2026-12661) Series C 7.101 (CVE-2025-12768, CVE-2026-12661) CVSS Vendor Equipment Vulnerabilities v3 8 Rockwell Automation Rockwell Automation Historian ME Out-of-bounds Write, Stack-based Buffer Overflow Background Critical Infrastructure Sectors: Chemical, Critical Manufacturing, Food and Agriculture, Healthcare and Public Health, Water and Wastewater Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2025-12768 A security issue exists within FactoryTalk® Historian Machine Edition. An attacker with low-level authentication could exploit this vulnerability to achieveremote code execution on the affected device. View CVE Details Affected Products Rockwell Automation Historian ME Vendor:Rockwell Automation Product Version:Rockwell Automation Series B: 5.202, Rockwell Automation Series C: 7.101 Product Status:known_affected Remediations MitigationCustomers using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automations security best practices found at https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight.https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight MitigationIf you have any questions regarding the security issue(s) above and how to mitigate them, contact TechConnect for help. More information can be found at https://www.rockwellautomation.com/en-us/company/about-us/contact-us.html.https://www.rockwellautomation.com/en-us/company/about-us/contact-us.html MitigationIf you have any questions regarding this disclosure, please contact PSIRT Email: rasecure@ra.rockwell.commailto:rasecure@ra.rockwell.com Relevant CWE: CWE-787 Out-of-bounds Write Metrics CVSS Version Base Score Base Severity Vector String 3.1 8 HIGH CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 4.0 8.6 HIGH CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-12661 A denial-of-service security issue exists within FactoryTalk® Historian Machine Edition. A network adjacent attacker who is authenticated could send craftedrequests to the web interface, resulting in buffer overflow conditions that may cause the device to crash and become unresponsive. View CVE Details Affected Products Rockwell Automation Historian ME Vendor:Rockwell Automation Product Version:Rockwell Automation Series B: 5.202, Rockwell Automation Series C: 7.101 Product Status:known_affected Remediations MitigationCustomers using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automations security best practices found at https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight.https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight MitigationIf you have any questions regarding the security issue(s) above and how to mitigate them, contact TechConnect for help. More information can be found at https://www.rockwellautomation.com/en-us/company/about-us/contact-us.html.https://www.rockwellautomation.com/en-us/company/about-us/contact-us.html MitigationIf you have any questions regarding this disclosure, please contact PSIRT Email: rasecure@ra.rockwell.commailto:rasecure@ra.rockwell.com Relevant CWE: CWE-121 Stack-based Buffer Overflow Metrics CVSS Version Base Score Base Severity Vector String 3.1 4.5 MEDIUM CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H 4.0 4.8 MEDIUM CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Acknowledgments Rockwell Automation 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. 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 these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-09-01 Date Revision Summary 2026-09-01 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Vendor Rockwell Automation Tags Sector: Chemical Sector, Critical Manufacturing Sector, Food and Agriculture Sector, Healthcare and Public Health 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 Sep 01, 2026 ICS Advisory | ICSA-26-244-05 Rockwell Automation ControlLogix, CompactLogix, CompactLogix 5480, GuardLogix, Compact GuardLogix Sep 01, 2026 ICS Advisory | ICSA-26-244-01 Rockwell Automation RSLinx Classic Sep 01, 2026 ICS Advisory | ICSA-26-244-04 Rockwell Automation FactoryTalk Activation Manager Sep 01, 2026 ICS Advisory | ICSA-26-244-02 Rockwell Automation Redundancy Module Configuration Tool

Indicators of Compromise

• cve — CVE-2025-12768
• cve — CVE-2026-12661

Entities