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Vulnerabilities

Vulnerability · 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 exploited

Published Jun 24, 2025 · catalog updated Jun 25, 2025 · Hitachi Energy Relion 670/650 and SAM600-IO

Last checked Oct 27, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-2403. EPSS is 0.37%. Act only if a listed version of Hitachi Energy Relion 670/650 and SAM600-IO is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.37%
Remediation
Vendor / distro source
Affected products
vendor Hitachi Energy Relion 670/650 and SAM600-IO 2.2.5.6

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Hitachi Energy Relion 670/650 and SAM600-IO 2.2.5.62.2.5.6

How to fix CVE-2025-2403

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-2403. EPSS is 0.37%. Act only if a listed version of Hitachi Energy Relion 670/650 and SAM600-IO is installed.

Which versions are affected?

Compare what you have installed with Hitachi Energy Relion 670/650 and SAM600-IO 2.2.5.6 2.2.5.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.37%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 24, 2025 · EUVD

    Detected

    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.

  2. Jun 25, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-2403

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-2403

    30-day exploitation probability 0.37%

    first.org
  • EUVDVulnerability recordEUVD-2025-19005

    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 malfun

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 24, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026