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CVE-2021-40333

CRITICAL
Published 2021-12-02T18:29:36.828706Z
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CVSS Score

V3.1
9.0
/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.422
Higher than 42.2% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED

Impact Metrics

Confidentiality
LOW
Integrity
HIGH
Availability
HIGH

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.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (CRITICAL) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

References

Workarounds

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.

Solutions

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

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

EU Coordinated

Exploitation Status

No Known Exploitation

ENISA Analysis

Malicious code in bioql (PyPI)

Affected Products (ENISA)

hitachi energy
xcm20

ENISA Scoring

CVSS Score (3.1)

9.0
/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H

EPSS Score

0.200
probability

Data provided by ENISA EU Vulnerability Database. Last updated: October 3, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-94q6-cm2f-p4pc

Advisory Details

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.

CVSS Scoring

CVSS Score

7.5

Advisory provided by GitHub Security Advisory Database. Published: December 3, 2021, Modified: December 8, 2021

References

Published: 2021-12-02T18:29:36.828706Z
Last Modified: 2024-09-17T00:15:37.686Z
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