Summary
Successful exploitation of this vulnerability could reduce the computational cost required for an attacker to perform offline brute-force attacks against stored password hashes.
The following versions of Rockwell Automation OTTO Fleet Manager are affected:
- OTTO Fleet Manager <=V2.36.2 (CVE-2026-75112)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 6.8 | Rockwell Automation | Rockwell Automation OTTO Fleet Manager | Use of Password Hash With Insufficient Computational Effort |
Background
- Critical Infrastructure Sectors: Critical Manufacturing, Transportation Systems
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
CVE-2026-75112
A security issue exists within OTTO Fleet Manager. The vulnerability stems from the use of an insufficient work factor in the bcrypt password hashing implementation, which could reduce the computational cost required for an attacker to perform offline brute-force attacks against stored password hashes. If an attacker gains access to an unencrypted system backup, the weakly hashed credentials could be more easily compromised.
Affected Products
Rockwell Automation OTTO Fleet Manager
Rockwell Automation
Rockwell Automation OTTO Fleet Manager: <=V2.36.2
known_affected
Remediations
Mitigation
Rockwell Automation has addressed this vulnerability in software version 2.36.3.
https://file-share.ottomotors.com/login
Mitigation
Users of the affected software who are not able to upgrade to the corrected version or apply the mitigations should use Rockwell Automation’s security best practices.
https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight
Vendor fix
See Rockwell Automation security advisory SD1791 for more information about this issue and instructions to enable encrypted system backup in OTTO Fleet Manager.
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1791.html
Mitigation
If you have any questions regarding the security issue(s) above and how to mitigate them, contact Rockwell Automation support.
https://ottomotors.com/otto-care/
Mitigation
If you have any questions regarding this disclosure, please email Rockwell Automation PSIRT: rasecure@ra.rockwell.com
mailto:rasecure@ra.rockwell.com
Relevant CWE: CWE-916 Use of Password Hash With Insufficient Computational Effort
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 6.8 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| 4.0 | 6.9 | MEDIUM | CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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. This vulnerability is not exploitable remotely.
Revision History
- Initial Release Date: 2026-08-27
| Date | Revision | Summary |
|---|---|---|
| 2026-08-27 | 1 | Initial Republication of Rockwell Automation SD1791. |