Hitachi Energy Relion 670/650 and SAM600-IO up to 2.2.6.2 Line Distance Communication allocation of resources

Summaryinfo

A vulnerability was found in Hitachi Energy Relion 670 and 650 and SAM600-IO 2.2.2.6/2.2.3.7/2.2.4.4/2.2.5.6/2.2.6.2. It has been classified as critical. This vulnerability affects unknown code of the component Line Distance Communication Module. The manipulation leads to allocation of resources. This vulnerability is referenced as CVE-2025-2403. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Hitachi Energy Relion 670 and 650 and SAM600-IO 2.2.2.6/2.2.3.7/2.2.4.4/2.2.5.6/2.2.6.2 and classified as critical. This issue affects an unknown code block of the component Line Distance Communication Module. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

A denial-of-service vulnerability due to improper prioritization of network traffic over protection mechanism exists in Relion 670/650 and SAM600-IO series device that if exploited could potentially cause critical functions like LDCM (Line Distance Communication Module) to malfunction.

The advisory is shared at publisher.hitachienergy.com. The identification of this vulnerability is CVE-2025-2403 since 03/17/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-19005). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Hitachi Energy

Name

• 650 and SAM600-IO
• Relion 670

Version

• 2.2.2.6
• 2.2.3.7
• 2.2.4.4
• 2.2.5.6
• 2.2.6.2

License

• commercial

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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