Rockwell Automation ArmorStart LT

Summary

Rockwell Automation's ArmorStart LT firmware versions up to v2.001 are affected by two critical vulnerabilities. CVE-2026-19471 allows for stored cross-site scripting (XSS) by injecting malicious scripts into web pages, while CVE-2026-19472 enables denial-of-service (DoS) attacks by exploiting improper handling of HTTP PUT requests. Rockwell Automation has released firmware version v2.002 to address these issues.

Full text

ICS Advisory Rockwell Automation ArmorStart LT Release DateSeptember 03, 2026 Alert CodeICSA-26-246-04 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of these vulnerabilities could result in a loss of webserver availability or allow an attacker to inject malicious scripts that will be executed when other users access the affected page. The following versions of Rockwell Automation ArmorStart LT are affected: ArmorStart LT <=v2.001 (CVE-2026-19471, CVE-2026-19472) CVSS Vendor Equipment Vulnerabilities v3 7.5 Rockwell Automation Rockwell Automation ArmorStart LT Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), Allocation of Resources Without Limits or Throttling Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-19471 Multiple stored cross-site scripting security issues exist within ArmorStart LT. Stored XSS occurs when user input is not properly sanitized and is stored on the server, allowing an attacker to inject malicious scripts that will be executed when other users access the affected page. View CVE Details Affected Products Rockwell Automation ArmorStart LT Vendor:Rockwell Automation Product Version:Rockwell Automation ArmorStart LT: <=v2.001 Product Status:known_affected Remediations MitigationRockwell Automation has corrected this issue in firmware version v2.002, and encourages all users to update to the newest version. MitigationUsers of the affected software who are not able to upgrade to one of the corrected versions should follow Rockwell Automation's security best practices.https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight MitigationFor more information on this issue, see the Rockwell Automation security advisory at: https://www.rockwellautomation.com/en-us/trust-center/security-advisories.htmlhttps://www.rockwellautomation.com/en-us/trust-center/security-advisories.html Relevant CWE: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.3 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L 4.0 6.9 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVE-2026-19472 A denial-of-service security issue exists within ArmorStart LT. The security issue stems from improper handling of a crafted HTTP PUT request sent to the embedded web server. This can result in a loss of web server availability. View CVE Details Affected Products Rockwell Automation ArmorStart LT Vendor:Rockwell Automation Product Version:Rockwell Automation ArmorStart LT: <=v2.001 Product Status:known_affected Remediations MitigationRockwell Automation has corrected this issue in firmware version v2.002, and encourages all users to update to the newest version. MitigationUsers of the affected software who are not able to upgrade to one of the corrected versions should follow Rockwell Automation's security best practices.https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight MitigationFor more information on this issue, see the Rockwell Automation security advisory at: https://www.rockwellautomation.com/en-us/trust-center/security-advisories.htmlhttps://www.rockwellautomation.com/en-us/trust-center/security-advisories.html Relevant CWE: CWE-770 Allocation of Resources Without Limits or Throttling Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 4.0 8.7 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-09-03 Date Revision Summary 2026-09-03 1 Initial Republication of Rockwell Automation security advisory. Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Vendor Rockwell Automation Tags Sector: Critical Manufacturing Sector 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 03, 2026 ICS Advisory | ICSA-26-246-08 Tycon Systems TPDIN-Monitor-WEB3 Sep 03, 2026 ICS Advisory | ICSA-26-246-02 IXON VPN Client Sep 03, 2026 ICS Advisory | ICSA-26-169-07 Schneider Electric Easergy, EcoStruxture, PowerLogic, and Saitel Products (Update A) Sep 03, 2026 ICS Advisory | ICSA-26-202-01 Tycon Systems TPDIN-Monitor-WEB2 (Update A)

Indicators of Compromise

• cve — CVE-2026-19471
• cve — CVE-2026-19472

Entities