CVE-2026-42941

Adjacent-network device access via unchanged default credentials

Published May 29, 2026 · Updated May 29, 2026

Use of default credentials in Danelec MacGregor VDR G4e before 5.250 allows remote attackers to access the device from adjacent networks. The device provisions a default username and password and does not force operators to replace them, leaving the shipped account usable. An attacker on an adjacent network who knows the defaults can authenticate with that account and gain its privileges, affecting recorded-data confidentiality, integrity, and device availability.

CVSS severity8.7
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of default credentials in Danelec MacGregor VDR G4e before 5.250 allows remote attackers to access the device from adjacent networks. The device provisions a default username and password and does not force operators to replace them, leaving the shipped account usable. An attacker on an adjacent network who knows the defaults can authenticate with that account and gain its privileges, affecting recorded-data confidentiality, integrity, and device availability.

The record

CVE
CVE-2026-42941
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Danelec
Product
MacGregor Voyage Data Recorder (VDR) G4e
Classifications
CWE-1392, T1078.001
Attack vector
adjacent
Privileges
unauthenticated

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

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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 privilegesunauthenticated

What is affected?

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

Published CVSS scores

8.7ICS-CERTCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
8.3ICS-CERTCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1392Use of Default Credentials
T1078.001Default Accounts

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

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Your stack

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