CVE-2025-2403Network attack vector

Service interruption via network traffic starvation

Published Jun 24, 2025 · Updated Jun 25, 2025

Denial of service in Hitachi Energy Relion 670/650 and SAM600-IO firmware allows remote attackers to disrupt critical functions. The device improperly prioritizes untrusted network traffic over protection processing, allowing traffic volume to starve functions such as LDCM. No authentication or user interaction is required; the published impact is limited to availability, and no packet format or traffic threshold is disclosed.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Hitachi Energy Relion 670/650 and SAM600-IO firmware allows remote attackers to disrupt critical functions. The device improperly prioritizes untrusted network traffic over protection processing, allowing traffic volume to starve functions such as LDCM. No authentication or user interaction is required; the published impact is limited to availability, and no packet format or traffic threshold is disclosed.

The record

CVE
CVE-2025-2403
Published
Jun 24, 2025
Updated
Jun 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, CAPEC-125, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.7Hitachi EnergyCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5Hitachi EnergyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-125Flooding
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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