High severity · published Jun 24, 2025
CVE-2025-2403
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…
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
R6
Relion 670/650 and SAM600-IO · Hitachi Energy
2.2.6.0 through 2.2.6.2; 2.2.5.6; 2.2.4.4; 2.2.3.7; 2.2.2.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-2403
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-2403
publisher.hitachienergy.com
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000216&LanguageCode=en&DocumentPartId=&Action=Launch
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6.5
CVE-2025-1718
An authenticated user with file access privilege via FTP access can cause the Relion 670/650 and SAM600-IO series device to reboot due to improper disk space management