CVE-2026-40425

Root-password change via exposed authentication-file editing

Published May 29, 2026 · Updated May 29, 2026

Improper access control in Danelec MacGregor Voyage Data Recorder G4e before 5.250 allows remote authenticated users to edit authentication files. The web interface exposes direct editing of files that govern authentication instead of isolating them from the administrator account. Adjacent-network access and an administrator login are required; changing these files can replace the device's root password.

CVSS severity6.9
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper access control in Danelec MacGregor Voyage Data Recorder G4e before 5.250 allows remote authenticated users to edit authentication files. The web interface exposes direct editing of files that govern authentication instead of isolating them from the administrator account. Adjacent-network access and an administrator login are required; changing these files can replace the device's root password.

The record

CVE
CVE-2026-40425
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Danelec
Product
MacGregor Voyage Data Recorder (VDR) G4e
Classifications
CWE-552, T1098
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.250

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Danelec · MacGregor Voyage Data Recorder (VDR) G4eversion=0 <5.250

Published CVSS scores

5.7ICS-CERTCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L
4.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
6.9ICS-CERTCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo