CVE-2021-40333

Weak default credential associated with TCP port 26

Published Dec 2, 2021 CVSS 3.1 · 9 Critical EPSS < 1% KEV · Not listed
Description
Weak Password Requirements vulnerability in Hitachi Energy FOX61x, XCM20 allows an attacker to gain unauthorized access to the Data Communication Network (DCN) routing configuration. This issue affects: Hitachi Energy FOX61x versions prior to R15A. Hitachi Energy XCM20 versions prior to R15A.

Remediation

Vendor Solution

Fixed in FOX61x R14A Hotfix or XMC20 R14A Hotfix Fixed in FOX61x R15A or XMC20 R15A


Vendor Workaround

Recommended security practices and firewall configurations help protecting systems from attacks that originate from outside the network. Such practices include that network management systems and XMC20 networks are typically physically protected from direct access by unauthorized personnel and have no direct connections to the Internet, as well as are separated from other networks by means of a firewall system that has a minimal number of ports exposed (e.g., traffic to TCP port 26 should be blocked/dropped), and others that have to be evaluated case by case. Portable computers and removable storage media should be carefully scanned for viruses before they are connected to a control system.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-27512 Weak Password Requirements vulnerability in Hitachi Energy FOX61x, XCM20 allows an attacker to gain unauthorized access to the Data Communication Network (DCN) routing configuration. This issue affects: Hitachi Energy FOX61x versions prior to R15A. Hitachi Energy XCM20 versions prior to R15A.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
Hitachi Energy
Published
Updated
Sep 17, 2024, 12:15 AM
Reserved
Aug 31, 2021, 12:00 AM
Status
Modified
Published
Dec 2, 2021, 7:15 PM
Modified
Jun 17, 2026, 4:06 AM