View CSAF
Summary
Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service condition.
The following versions of Rockwell Automation CompactLogix 5370 are affected:
- CompactLogix 5370 (CVE-2025-11743)
- CompactLogix 5370 (CVE-2025-11743)
- CompactLogix 5370 (CVE-2025-11743)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 6.5 | Rockwell Automation | Rockwell Automation CompactLogix 5370 | Improper Validation of Specified Quantity in Input |
Background
- Critical Infrastructure Sectors: Critical Manufacturing
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
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CVE-2025-11743
The affected product is vulnerable to a denial-of-service issue. The security issue occurs when a malformed CIP forward open message is sent. This could result in a major nonrecoverable fault, which would require a restart to recover.
View CVE Details
Affected Products
Rockwell Automation CompactLogix 5370
Rockwell Automation
Rockwell Automation CompactLogix 5370: <=34.013, Rockwell Automation CompactLogix 5370: <=35.012, Rockwell Automation CompactLogix 5370: 36.011
known_affected
Remediations
Mitigation
Rockwell Automation reports that the following versions are fixed:
Mitigation
Versions 37.011 and later
Mitigation
Version 34.016
Mitigation
Version 35.015
Mitigation
Version 36.012
Mitigation
Users using the affected software, who are not able to upgrade to one of the corrected versions, should use our security best practices.
Mitigation
For additional details, refer to advisory SD1770 on the Rockwell Automation security page.
Mitigation
For additional details, refer to advisory SD1770 on the Rockwell Automation security page.
Relevant CWE: CWE-1284 Improper Validation of Specified Quantity in Input
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Acknowledgments
- Rockwell Automation 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 vulnerability, 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.
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. This vulnerability is not exploitable remotely.
Revision History
- Initial Release Date: 2026-01-22
| Date | Revision | Summary |
|---|---|---|
| 2026-01-22 | 1 | Initial Republication of Rockwell Automation SD1770 |