CVE-2026-42941
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Danelec MacGregor Voyage Data Recorder device includes a default username and password, with no enforced password change.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Danelec MacGregor Voyage Data Recorder ships with a default username and password combination that cannot be enforced to be changed, allowing unauthenticated attackers to gain full administrative access to the device over the network.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 5.250CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the device modelAccess the VDR management interface or check device documentation/labels to confirm it is a MacGregor Interschalt VDR G4e deviceAffected if Device is a MacGregor Interschalt VDR G4e
-
Check firmware versionLog into the VDR management interface and navigate to the system information or firmware version section, or use the device's CLI command to display firmware version (consult vendor documentation for exact command)Affected if Firmware version is lower than 5.250
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Verify default credentials are activeAttempt to log into the VDR management interface using the default administrative username and password (refer to Danelec MacGregor documentation for the default credentials)Affected if Default credentials grant full administrative access
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Check for password management featureNavigate to the administrative settings or user management section of the VDR interface and look for options to change the administrative passwordAffected if No option exists to change the default password or no password change mechanism is available
Your environment is affected if you have a MacGregor Interschalt VDR G4e device running firmware version below 5.250 that can be accessed using default administrative credentials with no ability to change them.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped5.250
Immediately change default credentials on all affected VDR units and implement a password policy requiring credential rotation; consider network segmentation to limit exposure until remediation is complete.
Interschalt Vdr G4e Firmware version 5.250 or later
- 1. Identify the current firmware version of the Interschalt Vdr G4e device by accessing the device administration interface or checking system information.
- 2. Download the latest firmware version 5.250 or higher from the Danelec MacGregor official support website or via authorized distribution channels.
- 3. Review the firmware release notes to confirm the update addresses the default credential vulnerability (CWE-1392).
- 4. Create a backup of the current device configuration before performing the firmware upgrade.
- 5. Apply the firmware upgrade following the manufacturer's documented procedure, ensuring uninterrupted power during the process.
- 6. After upgrading, verify that the device now enforces password change on first login or supports credential modification.
- 7. Change the default username and password to unique, strong credentials immediately after the upgrade.
- 8. Implement network segmentation or firewall rules to restrict access to the VDR device to only authorized personnel and trusted networks.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing2.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-42941 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-42941 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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