What’s Vulnerable › Vulnerabilities

CVE-2021-40333: Weak default credential associated with TCP port 26

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-02 · updated 2026-06-17
• Weakness: CWE-521

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.

Affected products

• Hitachienergy Fox615 Firmware: before r15a — fixed in r15a
• Hitachienergy Xcm20 Firmware: before r15a — fixed in r15a

How to fix

Upgrade to a fixed version: Hitachienergy Fox615 Firmware r15a; Hitachienergy Xcm20 Firmware r15a. Check the vendor advisory for mitigations.

References

• https://search.abb.com/library/Download.aspx?DocumentID=8DBD000062&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=8DBD000069&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=8DBD000062&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=8DBD000069&LanguageCode=en&DocumentPartId=&Action=Launch

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