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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0142
Radius MD5 Vulnerability in Hitachi Energy XMC20 product

Original Issue Date:March 17, 2026

Severity Rating: CRITICAL

Systems Affected

  • XMC20 version R18
  • XMC20 version R17A and prior

Overview

A vulnerability in RADIUS protocol affects Hitachi Energy XMC20 series of industrial telecommunication network elements. This vulnerability can be exploited by an unauthenticated attacker to perform forgery attacks thereby impacting confidentiality, integrity and availability for the System.

Target Audience:
Organizations using Hitachi Electric¿s XMC20 series of network elements for industrial telecommunication.

Risk Assessment:
High risk of data disclosure, alteration and service disruption.

Impact Assessment:
Potential High impact on Confidentiality, Integrity and Availability of the System.

Description

XMC20 series of products are multi-service telecommunication network elements designed for mission-critical access and transport networks in industrial environments.

Vulnerability exists in the RADIUS protocol due to improper validation of integrity checks and enforcement of message integrity during transmission.

An unauthenticated attacker could exploit this vulnerability by modifying valid RADIUS authentication responses to any other response using a chosen-prefix collision attack against MD5 Response Authenticator signature leading to unauthorized access, data disclosure, data alteration or service disruption on affected devices.

Workaround

Hitachi Electric recommends to follow the General Mitigations/ Workarounds available at:
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000233&LanguageCode=en

Solution

  • Upgrade the affected product to the version R18 and enable RADIUS Message-Authenticator option in the RADIUS configuration of XMC20 and the RADIUS Server.

Vendor Information

Hitachi Energy
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000233&LanguageCode=en

References

Hitachi Energy
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000233&LanguageCode=en

CISA
https://www.cisa.gov/news-events/ics-advisories/icsa-26-036-05

CVE Name
CVE-2024-3596

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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