All CISA Advisories, CISA, June 16, 2026
Summary
Successful exploitation of this vulnerability could cause a denial-of-service condition that may result in a major nonrecoverable fault (MNRF).
The following versions of Rockwell Automation Logix 5370 & 5570 Controllers Vulnerable To Denial of Service Via CIP are affected:
- CompactLogix 5370 <=34.016 (CVE-2026-11317)
- Compact GuardLogix 5370 <=35.015 (CVE-2026-11317)
- ControlLogix 5570 <=35.015 (CVE-2026-11317)
- GuardLogix 5570 36.012 (CVE-2026-11317)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.5 | Rockwell Automation | Rockwell Automation Logix 5370 & 5570 Controllers Vulnerable To Denial of Service Via CIP | Improper Resource Shutdown or Release |
Background
- Critical Infrastructure Sectors: Critical Manufacturing
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
CVE-2026-11317
A denial of service security issue exists in the affected product. The security issue stems from a fault occurring when a crafted CIP message is sent. Devices with less memory are more likely to be affected. This can result in a major nonrecoverable fault (MNRF). A program download is required to recover.
Affected Products
Rockwell Automation Logix 5370 & 5570 Controllers Vulnerable To Denial of Service Via CIP
Rockwell Automation
Rockwell Automation CompactLogix 5370: <=34.016, Rockwell Automation Compact GuardLogix 5370: <=35.015, Rockwell Automation ControlLogix 5570: <=35.015, Rockwell Automation GuardLogix 5570: 36.012
known_affected
Remediations
Vendor fix
Rockwell Automation recommends users to update to the following versions: CompactLogix 5370: Versions 34.016 and later
Vendor fix
Compact GuardLogix 5370: Versions 35.015 and later
Vendor fix
ControlLogix 5570: Versions 36.012 and later
Vendor fix
GuardLogix 5570: Versions 37.011 and later
Mitigation
For more information, see Rockwell Automation Security Advisory SD1772 (https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1772.html)
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1772.html
Relevant CWE: CWE-404 Improper Resource Shutdown or Release
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 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.
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: 2026-06-16
| Date | Revision | Summary |
|---|---|---|
| 2026-06-16 | 1 | Initial Republication of Rockwell Automation Security Advisory SD1772 |
