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Interschalt Vdr G4e FirmwareOperating system · Macgregor

CVE-2026-42951

MEDIUM · 5.4 CVSS v3.1 Published 2026-05-29
Fix available
A fix is available. Upgrade to 5.250 or later.
See remediation →
56/100
Remediation priority · Elevated
Zero-click

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 · unedited
An authenticated user can download a backup of the Danelec MacGregor Voyage Data Recorder device which includes account data and password hashes.

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 · moderate confidence

An authenticated user can download a backup file from the Danelec MacGregor Voyage Data Recorder that contains plaintext account data and password hashes, exposing user credentials through the backup mechanism.

MitigationImplement proper authorization controls to restrict backup downloads and ensure backup files exclude sensitive data or are encrypted.

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
Interschalt Vdr G4e FirmwareOperating system
Affected:< 5.250

CVSS 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
High
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device and firmware version
    Access the Danelec MacGregor VDR web interface or use SNMP/SSH to query the device. Look for firmware version information in the system status or about section. For command-line access, run: 'show version' or check /etc/version depending on available shell.
    Affected if The firmware version is Macgregor Interschalt Vdr G4e and is below 5.250.
  2. Locate the backup download functionality
    Examine the web interface for a backup, export, or system save feature. Common paths include /backup, /export, /system/backup, or a download button in settings. Check the HTTP responses when navigating admin or settings menus.
    Affected if A backup or export option exists and is accessible to authenticated users.
  3. Verify backup contains sensitive data
    If you can obtain a backup file (from a test account or previous export), inspect its contents. Look for user account lists, password hashes, or credential-related fields within the backup archive.
    Affected if The backup file contains plaintext passwords, password hashes, or user credential data.
  4. Test access control on backup feature
    Create or use a non-administrator account (standard user or read-only role). Attempt to access and download the backup functionality using this account's credentials.
    Affected if A non-administrator authenticated user can successfully download the system backup.

You are affected if the device runs Macgregor Interschalt Vdr G4e firmware below version 5.250 and any authenticated user (not just administrators) can download a backup containing password hashes or credentials.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 5.250 or later
Fixed in 5.250
Interim mitigation

Implement proper authorization controls to restrict backup downloads and ensure backup files exclude sensitive data or are encrypted.

Recommended fix Moderate confidence

Firmware version 5.250 or later

  1. Identify the current firmware version of the Interschalt Vdr G4e device by accessing the device management interface
  2. Obtain the firmware version 5.250 or later from Danelec MacGregor official support channels (www.danelec.com)
  3. Review the vendor's official firmware update documentation and release notes
  4. Apply the firmware upgrade following the vendor's documented procedure, typically via the device's web interface or maintenance port
  5. After upgrading, verify the vulnerability is remediated by attempting to download a backup and confirming credentials are properly protected/hashed
  6. Consult CISA (www.cisa.gov) for any additional advisory information or mitigation guidance
Caveat Hardware firmware upgrades may require downtime and should be tested in a staging environment before production deployment; verify backup functionality works correctly after upgrade

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Interschalt Vdr G4e Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA3.0 h
25.0 hours of engineering $4,400
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,040.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-42951 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data