Summary
Successful exploitation of these vulnerabilities could result in an attacker gaining administrator access to the device.
The following versions of MacGregor Voyage Data Recorder (VDR) G4e are affected:
- MacGregor Voyage Data Recorder (VDR) G4e
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 8.3 | Danelec | MacGregor Voyage Data Recorder (VDR) G4e | Use of Default Credentials, Insufficiently Protected Credentials, Use of Password Hash With Insufficient Computational Effort, Use of Hard-coded Credentials, Files or Directories Accessible to External Parties |
Background
- Critical Infrastructure Sectors: Transportation Systems
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Denmark
Vulnerabilities
CVE-2026-42941
The VDR device includes a default username and password, with no enforced password change.
Affected Products
MacGregor Voyage Data Recorder (VDR) G4e
Danelec
Danelec MacGregor Voyage Data Recorder (VDR) G4e:
known_affected
Remediations
Vendor fix
Danelec has released firmware version V5.250 to resolve these vulnerabilities. Users of MacGregor Voyage Data Recorder (VDR) G4e devices are encouraged to update the firmware at the earliest service attendance rather than waiting for an annual performance test. Contact Danelec with additional questions: https://www.danelec.com/contact
https://www.danelec.com/contact
Relevant CWE: CWE-1392 Use of Default Credentials
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 8.3 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
| 4.0 | 8.7 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N |
CVE-2026-42951
An authenticated user can download a backup of the device which includes account data and password hashes.
Affected Products
MacGregor Voyage Data Recorder (VDR) G4e
Danelec
Danelec MacGregor Voyage Data Recorder (VDR) G4e:
known_affected
Remediations
Vendor fix
Danelec has released firmware version V5.250 to resolve these vulnerabilities. Users of MacGregor Voyage Data Recorder (VDR) G4e devices are encouraged to update the firmware at the earliest service attendance rather than waiting for an annual performance test. Contact Danelec with additional questions: https://www.danelec.com/contact
https://www.danelec.com/contact
Relevant CWE: CWE-522 Insufficiently Protected Credentials
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 5.4 | MEDIUM | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N |
| 4.0 | 5.9 | MEDIUM | CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N |
CVE-2026-44611
Passwords are stored with a hashing method which limits password length and is susceptible to brute force attacks.
Affected Products
MacGregor Voyage Data Recorder (VDR) G4e
Danelec
Danelec MacGregor Voyage Data Recorder (VDR) G4e:
known_affected
Remediations
Vendor fix
Danelec has released firmware version V5.250 to resolve these vulnerabilities. Users of MacGregor Voyage Data Recorder (VDR) G4e devices are encouraged to update the firmware at the earliest service attendance rather than waiting for an annual performance test. Contact Danelec with additional questions: https://www.danelec.com/contact
https://www.danelec.com/contact
Relevant CWE: CWE-916 Use of Password Hash With Insufficient Computational Effort
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 5.4 | MEDIUM | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N |
| 4.0 | 5.9 | MEDIUM | CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N |
CVE-2026-42929
The device includes default accounts with hard-coded credentials.
Affected Products
MacGregor Voyage Data Recorder (VDR) G4e
Danelec
Danelec MacGregor Voyage Data Recorder (VDR) G4e:
known_affected
Remediations
Vendor fix
Danelec has released firmware version V5.250 to resolve these vulnerabilities. Users of MacGregor Voyage Data Recorder (VDR) G4e devices are encouraged to update the firmware at the earliest service attendance rather than waiting for an annual performance test. Contact Danelec with additional questions: https://www.danelec.com/contact
https://www.danelec.com/contact
Relevant CWE: CWE-798 Use of Hard-coded Credentials
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 8.3 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
| 4.0 | 8.7 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N |
CVE-2026-40425
The administrator account for the web interface can directly edit sensitive files related to authentication, potentially changing the root password.
Affected Products
MacGregor Voyage Data Recorder (VDR) G4e
Danelec
Danelec MacGregor Voyage Data Recorder (VDR) G4e:
known_affected
Remediations
Vendor fix
Danelec has released firmware version V5.250 to resolve these vulnerabilities. Users of MacGregor Voyage Data Recorder (VDR) G4e devices are encouraged to update the firmware at the earliest service attendance rather than waiting for an annual performance test. Contact Danelec with additional questions: https://www.danelec.com/contact
https://www.danelec.com/contact
Relevant CWE: CWE-552 Files or Directories Accessible to External Parties
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 5.7 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L |
| 4.0 | 6.9 | MEDIUM | CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N |
Acknowledgments
- Andrew Tierney of Pen Test Partners 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: 2026-05-28
| Date | Revision | Summary |
|---|---|---|
| 2026-05-28 | 1 | Initial Publication |